Answer:
4.59
Step-by-step explanation:
sin(angle) = opposite / hypotenus
Determine whether the degree of the function is even or odd and whether the function itself is even or odd.
Answer:
There are Even, Odd and None of them and this does not depend on the degree but on the relation. An Even function: [tex]f(-x)=f(x)[/tex] And Odd one: [tex]-f(x)=f(-x)[/tex]
Step-by-step explanation:
1) Firstly let's remember the definition of Even and Odd function.
An Even function satisfies this relation:
[tex]f(-x)=f(x)[/tex]
An Odd function satisfies that:
[tex]-f(x)=f(-x)[/tex]
2) Since no function has been given. let's choose some nonlinear functions and test with respect to their degree:
[tex]f(x)=x^{2}-4, g(x)= x^{5}+x^{3}[/tex]
[tex]f(x)=x^2 -4\Rightarrow f(-x)=(-x)^{2}-4\Rightarrow f(-x)=x^{2}-4\therefore f(x)=f(-x)[/tex]
[tex]g(-x)=-(x^{5}+x^{3})\Rightarrow g(-x)=-x^{5}-x^{3}\Rightarrow g(-x)=-g(x)[/tex]
3) Then these functions are respectively even and odd, because they passed on the test for even and odd functions namely, [tex]f(-x)=f(x)[/tex] and [tex]-f(x)=f(x)[/tex] for odd functions.
Since we need to have symmetry to y axis to Even functions, and Symmetry to Odd functions, and moreover, there are cases of not even or odd functions we must test each one case by case.
Final answer:
The degree of a polynomial indicates whether it is even or odd based on the highest power of x. Even functions exhibit symmetry across the y-axis, while odd functions show symmetry with respect to the origin. The derivative of an even function is odd due to the horizontal flip property during differentiation, and the integral of an odd function over a symmetric interval is zero.
Explanation:
To determine whether the degree of a function is even or odd, and whether the function itself is even or odd, one must understand the definitions and properties of even and odd functions. An even function satisfies the property f(-x) = f(x), implying symmetry across the y-axis. A classic example is the cosine function, cos x, or any power function x^n where n is an even number. Conversely, an odd function is defined by the property f(-x) = -f(x), indicating symmetry with respect to the origin. The sine function, sin(x), and x^n where n is odd, are examples of odd functions.
Regarding derivatives, it is interesting to note that the derivative of an even function results in an odd function due to the horizontal flip property of the derivative. This is because differentiation involves a limit process that inherently flips the sign of any even function's symmetric components, resulting in an odd function.
Moreover, both even and odd functions display specific behaviors when integrated over symmetric intervals: the integral of an odd function is zero due to its antisymmetric nature while even functions do not necessarily share this property. For instance, when considering a function expressed as a product, such as f(x) = (x^3 - 3x)e^{-x^2}, where one function is odd and the other even, the resulting function will be odd, based on the product of their respective eigenvalues with respect to the inversion operator.
Need help please answer what you can thank you
8)Find a ratio that compares the relative sizes of the quantities. (Use the same units of measurement for both quantities. Write the ratio as a fraction in simplest form.)
27 feet to 54 yards
9)Find the unit price (in dollars per ounce).
A 17-ounce box of cereal for $5.27
$ ? per ounce
12)A car uses 10 gallons of gasoline for a trip of 300 miles. How many gallons would be used on a trip of 240 miles?
? gal
13)Find a ratio that compares the relative sizes of the quantities. (Use the same units of measurement for both quantities. Write the ratio as a fraction in simplest form.)
1 quart to 1 gallon
14)Find a ratio that compares the relative sizes of the quantities. (Use the same units of measurement for both quantities. Write the ratio as a fraction in simplest form.)
3000 pounds to 4 tons
19)Find a ratio that compares the relative sizes of the quantities. (Use the same units of measurement for both quantities. Write the ratio as a fraction in simplest form.)
9 weeks to 7 days
Answer:
The answers to all the questions are given below.
Step-by-step explanation:
8)The ratio of the numbers 27 feet and 54 yard
1 foot = 0.3333 yard
27 feet = 9 yard
Required ratio = [tex]\frac{9}{54}[/tex] = 0.167
9)A 17 ounce bag costs $5.27.
Hence cost of 1 ounce bag = [tex]\frac{5.27}{17}[/tex] = $0.31
12)For trip of 240 miles ,it uses 8 gallons.
13)1 quart = 0.25 gallons
Hence the ratio would be [tex]\frac{1}{4}[/tex]
14)1 pound = 0.0005 tonnes.
Hence the ratio would be [tex]\frac{1}{2000}[/tex]
19)1 week = 7 days
So the ratio would be [tex]\frac{1}{9}[/tex]
These are the required ratios
What is the average rate of change of the function on the interval from x = 0 to x = 5 f(x)=
1/2(3)x
What is the average rate of change of the function on the interval from x = 0 to x = 5 ; f(x)= 1\2 (3)^x
Answer:
Average rate of change of the function on the interval from x = 0 to x = 5 is 24.2
Solution:
Given function is:
[tex]f(x) = \frac{1}{2}(3^x)[/tex]
We have to find the average rate of change of function from x = 0 to x = 5
The formula for average rate of change can be expressed as follows:
[tex]{A\left( x \right) = \frac{{f\left( b \right) - f\left( a \right)}}{{b - a}}}[/tex]
So for rate of change of function from x = 0 to x = 5 is:
[tex]{A\left( x \right) = \frac{{f\left( 5 \right) - f\left( 0 \right)}}{{5 - 0}}}[/tex]
Let us find f(0) and f(5)
To find f(0), substitute x = 0 in f(x)
[tex]f(0) = \frac{1}{2}(3^0) = \frac{1}{2}[/tex]
To find f(5), substitute x = 5 in f(x)
[tex]f(5) = \frac{1}{2}(3^5) = \frac{1}{2}(243) = \frac{243}{2}[/tex]
Therefore,
[tex]A(x)=\frac{\frac{243}{2}-\frac{1}{2}}{5-0}=\frac{242}{\frac{2}{5}}=\frac{242}{2} \times \frac{1}{5}=24.2[/tex]
Therefore average rate of change of the function on the interval from x = 0 to x = 5 is 24.2
Special right triangles, find x and y
Answer:
The answer to your question is x = 17.32; y = 8.67
Step-by-step explanation:
Process
1.- Use trigonometric functions to find x and y
a) sin Ф = [tex]\frac{opposite side}{hypotenuse}[/tex]
Ф = 60°
opposite side = 15
hypotenuse = ?
[tex]hypotenuse = \frac{opposite side}{sin \alpha }[/tex]
[tex]hypotenuse = \frac{15}{sin 60}[/tex]
[tex]hypotenuse = \frac{15}{0.87}[/tex]
hypotenuse = 17.32
b) cosФ = [tex]\frac{y}{hypotenuse}[/tex]
[tex]y = hypotenuse x cos 60[/tex]
[tex]y = 17.32 x 0.5[/tex]
y = 8.67
Sandy is a jeweler. She has 2 grams of gold. Each erring she makes contains 3/16 grams of gold. How many errings could she make from a gold bar of 1,000 grams of gold. Show your work
Sandy would be able to make 5,333 earrings with a gold bar of 1,000 grams.
Given that;
Sandy has 2 grams of gold, and each earring requires 3/16 grams of gold.
Now for the number of earrings she can make, divide the total amount of gold she has by the amount of gold needed for each earring.
[tex]\text {Number of earrings} = \dfrac{\text {Total gold} }{\text {Gold per earring} }[/tex]
[tex]\text {Number of earrings} = \dfrac{\text {2} }{\text {3/16} }[/tex]
To divide by a fraction, multiply by its reciprocal:
[tex]\text {Number of earrings} = \text {2} \times \dfrac{16}{3}[/tex]
Now, let's simplify the calculation:
[tex]\text {Number of earrings} = \dfrac{32}{3}[/tex]
Therefore, Sandy can make 10 earrings with 2 grams of gold, leaving 2 grams remaining.
When she had a gold bar of 1,000 grams, use the same approach to find out how many earrings she can make:
[tex]\text {Number of earrings} = \dfrac{\text {1000} }{\text {3/16} }[/tex]
[tex]\text {Number of earrings} = 5333[/tex]
So, Sandy would be able to make 5,333 earrings with a gold bar of 1,000 grams.
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Sandy could make about 5,333 earrings from 1,000 grams of gold by dividing 1,000 grams by the weight of gold in each earring (3/16 grams), which equates to multiplying 1,000 by the reciprocal of 3/16
Explanation:To solve this, we need to figure out how many times 3/16 grams goes into 1,000 grams. To do this, we divide 1,000 by 3/16.
However, when dividing by a fraction, it's often easier to multiply by its reciprocal (flip the fraction) instead. So we'll turn 1,000 into 1,000/1, and multiply by 16/3 (the reciprocal of 3/16).
First convert 1,000 into fraction form: 1,000 = 1,000/1Write the problem as a multiplication problem: 1,000/1 x 16/3Multiply the numerators (top numbers) together: 1,000 x 16 = 16,000Multiply the denominators (bottom numbers) together: 1 x 3 = 3So, 1,000/1 x 16/3 = 16,000/3Finally, take this result and divide the numerator by the denominator: 16,000 ÷ 3 ≈ 5333.3Therefore, Sandy could make about 5,333 earrings from 1,000 grams of gold.
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someone please help me with this math problem quickly!
Answer:
(fоgоh)(x)=2x³+1
Step-by-step explanation:
Function composition is an operation where two functions, say f(x) and g(x), a new function h(x)=(fоg)(x)=f(g(x)) is generated. In this operation, the function g is applied to the result of the function f. Hence, function f:X→Y and g:Y→Z are joined to form a new function h:X→Z
Given [tex]f(x)=x+1[/tex]
[tex]g(x)=2x[/tex]
[tex]h(x)=x^{3}[/tex]
(fоgоh)(x)=[tex]f(g(h(x)))[/tex]
=[tex]f(g(x^{3}))[/tex]
=[tex]f(2x^{3})[/tex]
=2x³+1
The high temperature in Fairbanks, Alaska was 15.7 degrees. That night it fell 38.4 degrees. The next morning, it rose 12.2 degrees. What was the temperature in the morning? Answer with just the number, no units. *
Answer:
The temperature in the morning was [tex]-10.5^o[/tex]
Step-by-step explanation:
we know that
1) The high temperature in Fairbanks, Alaska was 15.7 degrees
That night it fell 38.4 degrees
so
The temperature at night was
[tex]15.7^o-38.4^o=-22.7^o[/tex]
2) The next morning, it rose 12.2 degrees.
so
The temperature in the morning was
[tex]-22.7^o+12.2=-10.5^o[/tex]
Mike is riding his bike 8 mi./hr northwest, and Shelly is riding her bike 11 mi./hr southwest. Both are headed for the intersection of the two bike paths. At what rate are the bikes approaching each other when Mike is 0.2 mi. and Shelly is 0.5 mi. from the intersection?
Answer: GLOBAL WARMING FOESNT EXIST
Step-by-step explanation: STOP RIDING BIKES MORE CARS
Suppose that you arrive at a bus stop randomly, so all arrival times are equally likely. The bus arrives regularly every 30 minutes without delay (say, on the hour and on the half hour). What is the expected value of your waiting time? Explain how you got your answer.
Answer:
E(x) = 15 minutes
Step-by-step explanation:
The random variable X (waiting time) has a uniform distribution between the interval [0,30], because it is just as likely that you arrive in any time and then your waiting time is minimum 0 minutes and maximum 30 minutes
The expected value of a random variable uniform is:
E(x) = [tex]\frac{a+b}{2}[/tex]
Where a and b are the interval's extremes
Thus
E(x) = [tex]\frac{0+30}{2}[/tex]
E(x) = 15 minutes
PLEASE HELP ME AND SIMPLIFY THE POLYNOMIAL 24 POINTS
Answer: it would be A
Suppose 60% of all college professors like tennis, 65% like bridge, and 50% like chess; 45% like any given pair of recreations.
(a) Should you be suspicious if told 20% like all three recreations?
(b) What is the smallest percentage who could like all three recreations?
Answer:
a) yes we should get suspicious
b) smallest percentage to like all three sports= 60
Step-by-step explanation:
Let the total professors be =100
n(tennis) = 60
n( bridge) = 65
n( chess)= 50
n( T U B) = 45, n(BU C) = 45, n(T UC)=45
n( T U B U C)= n(T) + n(B) + n(C) - n( T U B) - n( BU C) - n(TUC) + [tex]n(T\cap B\cap C)[/tex]
100 = 60 + 65 + 50 - 45-45-45 + [tex]n(T\cap B\cap C)[/tex]
[tex]n(T\cap B\cap C)[/tex] = 60
Therefore,
a) yes we should get suspicious
b) smallest percentage to like all three sports= 60
Final answer:
The given information suggests that we should be suspicious if told that 20% of all college professors like all three recreations. The smallest percentage who could like all three recreations is 0%.
Explanation:
(a) Yes, we should be suspicious if told that 20% of all college professors like all three recreations. This is because the given information states that 45% of college professors like any given pair of recreations. If 20% of them like all three, it means that the remaining 25% (45% - 20%) would have to like two recreations, which contradicts the given data.
(b) The smallest percentage who could like all three recreations is 0%. Since the information states that 50% of college professors like chess and 65% like bridge, it means that at most, 50% (the percentage who like chess) can like both chess and bridge. Therefore, there is no overlap between those who like chess and bridge, and those who like tennis. Hence, the smallest percentage who could like all three recreations is 0%.
How would you define the following ad placed by a broker in NY, "Two-family home, $190,000, Call 212-123-4567"?
Answer:
The ad is about the price of a house which is sufficient for two families to live in it along with the contact details to purchase this house.
According to the ad, the total cost of the home is $190,000. It is sufficient for two families. It may be double story as well. To purchase this house, one can call at the given number which is 212-123-4567. This can be the original number or the format by the editor to show original number. Actual area of the house is not mentioned in the ad.
The speedometer in Kevin's car reads in both miles/hour and kilometers/hour. What information is needed to convert between these two units?a) the number of miles in 1 kilometerb) the number of kilometers that are traveled in 1 hourc) the number of miles that are traveled in 1 hourd) the number of hours per 1 kilometer
Answer:
a) the number of miles in 1 kilometer
Step-by-step explanation:
The car converts from miles/hour to kilometers/hour, if we see the time measurement (hours) it stays the same in both units.
So to make the conversion it is enough to know how many miles are in one kilometer.
For example, lets convert 10miles/hour to kilometers/hour.
there are 0.621371 miles in 1 kilometer, so if we divide 10miles/hour by 0.621371 we get kilometers/hour units:
[tex]\frac{10miles}{hour} (\frac{1kilometer}{0.621371miles} )=16.0934\frac{kilometers}{hour}[/tex]
Thus to make the conversion between the two units is needed the number of miles in 1 kilometer.
Oscar has a piece of pie would that is 9‘ x 9‘ explain how we can divided into two smaller pieces of plywood would the area of the smaller pieces equal to the area of the larger piece
Answer:
1. with the aid of a saw
2.No
Step-by-step explanation:
A. The 9‘ x 9‘ can be divided into two with the aid of a saw .
we have to take into account the area of the shape wic 9'x9'. and then saw the piece at the middle.
b.there are two sides to the second answer
1. the area of the smaller pieces will be smaller than the area of the larger piece
2. when the smaller pieces are placed side by side aain , tere area combined together will be the same as the original piece
Answer:
Part A. Using a handsaw.
Part B. Yes, the area of the two smaller pieces together equal the are of the large piece
Step-by-step explanation:
Part A. Explain how Oscar can divide it into two smaller pieces of plywood?
He can use a handsaw and cut the plywood in two smaller pieces of several measures, not necessarily the two smaller pieces need to be equal.
Part B. Would the area of the smaller pieces equal the area of the large piece?
Yes, the area of the two smaller pieces together equal the are of the large piece.
i. Let's suppose we have two pieces of 4.5 feet by 9 feet, then the combined area of these two pieces would be:
A = 4.5 *9 + 4.5 * 9
A = 40.5 + 40.5 = 81 ft² that is the same than 9 * 9 = 81 ft²
ii. Now let's suppose we divide the plywood into a piece of 6 ft by 9 ft and a second one of 3 ft by 9 ft, then the combined area of these two pieces would be:
A = 6 * 9 + 3 * 9
A = 54 + 27 = 81 ft² that is the same than 9 * 9 = 81 ft²
iii. Finally, let's suppose we divide the plywood into a piece of 1 ft by 9 ft and a second one of 8 ft by 9 ft, then the combined area of these two pieces would be:
A = 1 * 9 + 8 * 9
A = 9 +72 = 81 ft² that is the same than 9 * 9 = 81 ft²
There are three different hoses used to fill a pool: hose x, hose y, and hose z. Hose x can fill the pool in a days, hose y in b days, and hose z in c days, where a > b > c. When all three hoses are used together to fill a pool, it takes d days to fill the pool. Which of the following must be true?I. dbIII. c/3
Answer:
C) I and III only
Step-by-step explanation:
Let full pool is denoted by O
Days Hose x takes to fill pool O = a
Pool filled in one day x = O/a
Days Hose y takes to fill pool O = b
Pool filled in one day y = O/b
Days Hose z takes to fill pool O = c
Pool filled in one day z = O/c
It is given that
a>b>c
[tex]a>b>c>d\\\implies x<y<z<(x+y+z)\\[/tex]
Days if if x+y+z fill the pool together = d
1 day if x+y+z fill the pool together [tex]=O(\frac{1}{a}+\frac{1}{b}+\frac{1}{c})=\frac{O}{d}---(1)[/tex]
I) d < c
d are days when hose x, y, z are used together where as c are days when only z is used so number of days when three hoses are used together must be less than c when only z hose is used. So d < c
III) [tex]\frac{c}{3}<d<\frac{a}{3}[/tex]
Using (1)
[tex]\frac{bc+ac+ab}{abc}=\frac{1}{d}\\\\d=\frac{abc}{ab+bc+ca}\\\\As\quad(a>b>c)\\(ab+bc+ca)<3ab\\\\d=\frac{abc}{ab+bc+ca}>\frac{abc}{3ab}\\\\d>\frac{c}{3}[/tex]
Similarly
[tex]\frac{bc+ac+ab}{abc}=\frac{1}{d}\\\\d=\frac{abc}{ab+bc+ca}\\\\As\quad a>b>c\\(ab+bc+ca)>3bc\\\\d=\frac{abc}{ab+bc+ca}<\frac{abc}{3bc}\\\\d<\frac{a}{3}[/tex]
So,
[tex]\frac{c}{3}<d<\frac{a}{3}[/tex]
A running back was the MVP (most valuable player) in 0.14 of the first 50 Super Bowls. A. What percent of the MVPs were running backs? % were running backs. B. What fraction of the MVPs were not running backs? Were not running backs.
Answer:
A. 14%.
B. [tex]\frac{43}{50}[/tex]
Step-by-step explanation:
We have been given that a running back was the MVP (most valuable player) in 0.14 of the first 50 Super Bowls.
A. To find the percent, when the MVPs were running backs, we need to convert 0.14 into percent by multiplying by 100 as:
[tex]0.14\times 100=14\%[/tex]
Therefore, 14 percent of the MVPs were running backs.
B. To find the fraction of the MVPs were not running backs, we will subtract 0.14 from 1 to find the MVPs, who were not running backs. Finally, we will convert the answer into fraction as:
[tex]1-0.14=0.86[/tex]
Now, we will multiply and divide 0.86 by 100 as:
[tex]0.86\times \frac{100}{100}=\frac{86}{100}[/tex]
Reduce the fraction by dividing numerator and denominator by 2:
[tex]\frac{43}{50}[/tex]
Therefore, [tex]\frac{43}{50}[/tex] of the MVPs were not running backs.
14% of the MVPs in the first 50 Super Bowls were running backs. Yet, 43 out of 50 MVPs (or 86%) were not running backs.
Explanation:The running back was the MVP in 0.14 of the first 50 Super Bowls according to the question. To find the percent of the MVPs that were running backs, we simply convert the 0.14 to percentage by multiplying it by 100. Hence, 14% of the MVPs were running backs.
For the fraction of the MVPs that were not running backs, we need to calculate the remaining part not covered by the running backs. Given as 1 (entirety) minus 0.14 gives 0.86. In fraction terms, this is same as 86/100 which simplifies to 43/50.
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Abby's car gets approximately 24 miles per gallon she is planning a 1200 mile trip about how many gallons of gas should she plan to buy at an average price of $4.20 per gallon how much should she expect to spend for gas
Answer:
Step-by-step explanation:
Abby's car gets approximately 24 miles per gallon. This means that for every 24 mile that her car covers, it uses 1 gallon of gas. She is planning a 1200 mile trip. This means that the number of gallons of gas that she would need would be 1200/24 = 50 gallons.
One average price of 1 gallon of gas is $4.20. The total amount that she would spend in buying 50 gallons of gas would be
50 × 4.2 = $210
Abby needs 50 gallons of gas for her 1200-mile trip. At $4.20 per gallon, the total cost will be $210. This calculation helps Abby budget for her fuel expenses.
Abby needs to calculate the amount of fuel and the cost for a 1200-mile trip with her car that gets approximately 24 miles per gallon. Here's how to find out:
First, determine the number of gallons of gas needed:To find the number of gallons Abby needs, divide the total trip distance by her car's miles per gallon (MPG):
1200 miles / 24 MPG = 50 gallons
Next, calculate the cost of the gas:Multiply the number of gallons by the cost per gallon:
50 gallons x $4.20 per gallon = $210
Abby should plan to buy 50 gallons of gas for her 1200-mile trip, costing about $210 at $4.20 per gallon.
A recent survey showed that 102 adults out of a sample of 400 do not like cold weather. However, 115 of those studied said that they had interest in taking skiing lessons. Based on this sample, if an adult is chosen at random, what is the probability that he or she has no desire to take skiing lessons? Express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.
The probability that a randomly chosen adult from the survey has no desire to take skiing lessons is 57/80, or as a decimal, 0.7125.
Out of a sample of 400 adults, 115 expressed an interest in taking skiing lessons. Therefore, to find the number of adults who have no interest in skiing lessons, we subtract the number interested (115) from the total number surveyed (400).
The calculation is as follows: 400 - 115 = 285 adults who have no interest in taking skiing lessons. The probability that a randomly selected adult has no desire to take skiing lessons is the number of adults with no interest divided by the total number surveyed. This gives us:
Probability = (Number of adults with no desire to take skiing lessons) / (Total number of adults surveyed)Probability = 285 / 400
To simplify this fraction, we find that both numbers are divisible by 5:Probability = 57 / 80
If we want to express this as a decimal rounded to the nearest millionth, we perform the division:
Probability = 0.7125
This result is already rounded to the fourth decimal place, which is more precise than rounding to the nearest millionth.
HELP ASAP PLEASE!!!!
The image shows the rational equation from part A with an incorrect solution process that a student performed. Explain the error the student made, and give the correct solution.
Only problem is with the simplifying.
We all know that 5/5 = 1, it is natural to assume (x+a)/(x+a) is also 1, but in some cases where x+a=0, it is undefined. In this equation, where they simplify (x-2) and (x-6), you must say that x is not 2 nor 6 or, you just delete 0/0 which is undefined.
Therefore the only solution would be x=-1
The error that the student made in the rational equation simplification is that; She made 6 and -1 to be a solution but 6 is not a solution but only x = -1 because 6 makes the function undefined
Simplifying Rational EquationsFrom the simplification of the rational equation, the solution the person got is; x = 6 or -1
Now, when we put 6 for x in the rational equation, it is discovered that the denominator becomes zero for two of the expressions.
Now, when the denominator of a fraction is zero, that fraction is said to be undefined.
Whereas when x = -1, we don't get an undefined function. Thus, the mistake the student made is that 6 is not a solution but only x = -1
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Help!!!!!!! Thank you so much
Answer:
18] not a function; (1, 5), (1, -1)
19] is a function
Step-by-step explanation:
The graph of a function will pass the "vertical line test." That is, a vertical line will not intersect the graph at more than one point.
18] There are an infinite number of points where a vertical line will cross the graph twice. Two that are recognizable are the ones at the vertical extremes: (1, 5) and (1, -1). This relation is not a function.
__
19] None of the points on the graph are vertically aligned, so the relation is a function.
In a business class there are 14 business majors and 7 non-business majors. 4 students are randomly selected to present a topic. What is the probability that at least 2 of the 4 students selected are business majors?
Answer: 52/57
Step-by-step explanation:please see attachment for explanation
Final answer:
The question involves calculating the probability of selecting at least 2 business majors from a group, using complementary probability and combinations. The probability that at least 2 of the 4 students selected are business majors is approximately [tex]\(0.1608\).[/tex]
Explanation:
To find the probability that at least 2 of the 4 students selected are business majors, we can calculate the probability of exactly 2, 3, and 4 students being business majors, and then sum these probabilities.
First, let's find the probability of selecting exactly 2 business majors and 2 non-business majors:
1. Probability of selecting 2 business majors: [tex]\( \frac{{14 \choose 2}}{{21 \choose 4}} \)[/tex]
2. Probability of selecting 2 non-business majors:[tex]\( \frac{{7 \choose 2}}{{21 \choose 4}} \)[/tex]
Then, we can find the probability of selecting exactly 3 business majors and 1 non-business major:
1. Probability of selecting 3 business majors: [tex]\( \frac{{14 \choose 3}}{{21 \choose 4}} \)[/tex]
2. Probability of selecting 1 non-business major: [tex]\( \frac{{7 \choose 1}}{{21 \choose 4}} \)[/tex]
Finally, we find the probability of selecting all 4 business majors:
1. Probability of selecting 4 business majors: [tex]\( \frac{{14 \choose 4}}{{21 \choose 4}} \)[/tex]
Now, we sum up these probabilities:
[tex]\[\text{Probability of at least 2 business majors} = \text{Probability of selecting exactly 2} + \text{Probability of selecting exactly 3} + \text{Probability of selecting all 4}\][/tex]
[tex]\[\text{Probability of at least 2 business majors} = \left( \frac{{14 \choose 2}}{{21 \choose 4}} \times \frac{{7 \choose 2}}{{21 \choose 4}} \right) + \left( \frac{{14 \choose 3}}{{21 \choose 4}} \times \frac{{7 \choose 1}}{{21 \choose 4}} \right) + \left( \frac{{14 \choose 4}}{{21 \choose 4}} \right)\][/tex]
[tex]\[= \left( \frac{{91}}{{5985}} \times \frac{{21}}{{5985}} \right) + \left( \frac{{364}}{{5985}} \times \frac{{7}}{{5985}} \right) + \left( \frac{{1001}}{{5985}} \right)\][/tex]
[tex]\[= \left( \frac{{1911}}{{5985^2}} \right) + \left( \frac{{2548}}{{5985^2}} \right) + \left( \frac{{1001}}{{5985}} \right)\][/tex]
[tex]\[= \frac{{1911 + 2548 + 1001}}{{5985^2}}\][/tex]
[tex]\[= \frac{{5460}}{{5985^2}}\][/tex]
[tex]\[\approx 0.1608\][/tex]
So, the probability that at least 2 of the 4 students selected are business majors is approximately [tex]\(0.1608\).[/tex]
Martina creates the graph of function g by applying a transformation to function f.
f(x) = 4x-2
g(x) = 4x+7
Which transformation did Martina apply?
A.a vertical shift of 9 units down
B.a vertical shift of 9 units up
C. a horizontal shift of 9 units left
D. a horizontal shift of 9 units right
Answer:
B.a vertical shift of 9 units up
Step-by-step explanation:
Given [tex]f(x) = 4x-2\\g(x) = 4x+7[/tex]
[tex]g (x) = f (x) + k[/tex]
It means shifting [tex]f (x)\ k[/tex] unit vertically.
Now, we will find the value of [tex]k[/tex] for the given function
[tex]g(x) = 4x+7\\\\add\ 2\ and\ subtract\ 2\\\\g(x) = 4x+7+2-2\\g(x) = 4x-2+9\\\\We\ have\ f(x)=4x-2\\\So,\ g(x)=f(x)+9[/tex]
[tex]k=9[/tex]
Hence, vertical shift of 9 units.
Answer:
C. a horizontal shift of 9 units left
Step-by-step explanation:
Look at this helpful chart:
Vertical Translations
translation up k units: g(x) = f(x) + k, where k > 0
translation down k units: g(x) = f(x) – k, where k > 0
Horizontal Translations
translation left k units: g(x) = f(x + k), where k > 0
translation right k units: g(x) = f(x – k), where k > 0
The change happening in Martina's graph is therefore a horizontal translation to the left.
Which system of linear inequalities is represented by the graph?
y ≥ 2x + 1
y ≤ 2x – 2
Step-by-step explanation:
The equation of the line in Slope-Intercept form is:
[tex]y=mx+b[/tex]
Where "m" is the slope of the line and "b" is the y-intercept.
So, the lines of this system are:
1) [tex]y= 2x + 1[/tex]
Where:
[tex]m=2\\b=1[/tex]
2) [tex]y=2x- 2[/tex]
Where:
[tex]m=2\\b=-2[/tex]
Notice that:
- Since both lines have the same slope, they are parallel.
- The symbol of the first inequality is [tex]\geq[/tex] . This indicates that the line is solid and the shaded region must be above the line.
- The symbol of the second inequality is [tex]\leq[/tex] . This indicates that the line is solid and the shaded region must be below the line.
Therefore, the second graph represents the system of linear inequalities.
Answer:
b
Step-by-step explanation:
Find the four vertices of the cube, starting with (1, 1, 1), that form a regular tetrahedron. Confirm your answer by finding the length of an edge and explaining why all edges have the same length.
Answer:
the vertices (1,1,1), (1,0,0), (0,1,0) and (0,0,1) form a tetrahedron. The length of each side is √2
Step-by-step explanation:
The cube has 8 vertices: (0,0,0), (1,1,0), (0,1,0), (1,0,0), (0,0,1), (0,1,1), (1,0,1), (1,1,0) and (1,1,1). The first four of them are the vertices of the bottom square and the last four are the vertices of the upper square of the cube.
We will take two non-consecutive vertices from each square. For the upper one we take (1,1,1) as the problem suggests, and (0,0,1), which is not consecutive from (1,1,1) and its distance is √2. The non consecutive vertices from the bottom square respect to the vertex (1,1,1) are (0,0,0), (0,1,0) and (1,0,0).
We take (0,1,0) and (1,0,0) because (0,0,0) is consecutive from (0,0,1) hence its distance from it is not √2, but 1.
Note that we take (1,1,1), (0,0,1), (0,1,0) and (1,0,0). If we take any two vertices and compare them toguether we will notice that both of those vertices differ in two places and are equal in the other. In the places where they differ one has the value 1 and the other 0, so the distance between those vertices is √(1²+1²) = √2.
Thus, the vertices (1,1,1), (1,0,0), (0,1,0) and (0,0,1) form a tetrahedron.
Final answer:
Explaining how to find the vertices of a cube forming a regular tetrahedron and confirming why all cube edges have the same length.
Explanation:
To find the four vertices of a cube that form a regular tetrahedron starting with (1, 1, 1), we can consider the cube's diagonals. The vertices of the regular tetrahedron can be located at the center of each face of the cube, which are at coordinates (0, 0, 0), (2, 0, 0), (0, 2, 0), and (0, 0, 2).
The length of an edge of a cube is the distance between two adjacent vertices. To calculate the edge length, we can use the distance formula. Since all edges of a cube connect two adjacent vertices, they have the same length due to the cube's symmetry.
Therefore, all edges of the cube have the same length because each connects two adjacent vertices with equal coordinates.
The Atlanta Braves marketing staff knows it has 20,000 seats in the stadium priced at $20 per ticket, 13,000 priced at $30 per ticket, and 17,000 priced at $50 per ticket. Jim says that the marketing materials should say that average ticket price is $30, Jill says it should be $33, and Fred says it should be $35.20. Who is most correct?
Answer:
Jill is most correct and it should be $33
Step-by-step explanation:
Total number of seats = x =20000+13000+17000
x =50000
Total cost of seats as per the price;
a = 20*20000
a =400,000
b = 30*13000
b =390,000
c = 50*17000
c =850,000
Average = (a + b + c) /x
Average = (400,000+390,000+850,000)/50,000
Average cost = 1,640,000/50,000
Average cost = $32.8
If y=sin(x-sinx), what is the smallest positive value of x for which the tangent line is parallel to the x-axis
(a) 1.677
(b) 2.310
(c) 3.142
(d) 3.973
(e) 6.283
Answer:
Option b ) 2.310
Step-by-step explanation:
Given that the function is
[tex]y = sin (x-sinx)[/tex]
For finding when the tangent is parallel to x axis, we must find the least positive value of x for which y' i.e. derivative =0
Differentiate y with respect to x using chain rule.
[tex]y' = cos(x-sinx) * (1-cosx)[/tex]
Equate this to 0
Either one factor should be zero.
[tex]cos(x-sinx)=0\\x-sinx =\frac{\pi}{2} \\[/tex]
x=2.31 satisfies this
For the other root,
[tex]1-cos x =0\\cos x =1\\x =0\\[/tex]
Since positive least value is asked we can say
x =2.310
Option b
Write an equation of the line containing the given point and perpendicular to the given line:
(4,- 9); 2x+9y=5
Answer:
Step-by-step explanation:
The equation of a straight line can be represented in the slope intercept form as
y = mx + c
Where
m = slope = (change in the value of y in the y axis) / (change in the value of x in the x axis)
The equation of the given line is
2x+9y=5
9y = - 2x + 5
y = -2x/9 + 5/9
Comparing with the slope intercept form, slope = -2/9
If the line passing through the given point is perpendicular to the given line, it means its slope is the negative reciprocal of the slope of the given line.
Therefore, the slope of the line passing through (4,-9) is 9/2
To determine the intercept, we would substitute m = 9/2, x = 4 and y = -9 into y = mx + c. It becomes
- 9 = 9/2×4 + c = 18 + c
c = - 9 - 18 = - 27
The equation becomes
y = 9x/2 - 27
Jenny drew a figure in art class.
Does it have rotational symmetry? If yes, what is the angle of rotation?
Answer:
60, yes.
Step-by-step explanation:
Yes, it has symmetry if you rotate it. Because it is a hexagon, the degree of rotation is 360 (circle of rotation) divided by 6 sides, because it takes that many degrees to rotate till the next side enters the position of the previous side. 360/6 is equal to 60.
Answer : Yes, it has rotational symmetry. The angle of rotation is, [tex]60^o[/tex]
Step-by-step explanation :
Rotational symmetry : It is a shape that has Rotational Symmetry when it still the same after the rotation.
The given figure is hexagon and it has rotational symmetry because it still the same after the rotation.
As there are 6 sides of hexagon geometry and the degree of rotation is, [tex]360^o[/tex].
So, the angle of rotation = [tex]\frac{360^o}{6}=60^o[/tex]
If 15 of the students are male and 18 of the students are female in a mathclass, what fractional part of the class is female?
Answer:
6/11
Step-by-step explanation:
Assuming all students are accounted for, the fraction that is female is ...
female/total = 18/(15+18) = 18/33 = 6/11
You have a deck that has an area of 160 sq. Ft. You and your family have decided to increase the area of your deck to 180 sq. Ft. What is the percent of increase to the area of the deck? Round your answer to the nearest tenth if necessary. Show your work.
Answer:The percent of increase of the area of the deck is 12.5%
Step-by-step explanation:
The initial area of the deck is 160 square feet. You and your family have decided to increase the area of your deck to 180. The amount by which the area of the deck was increased is is 180 - 160 = 20 square feet.
The percent of increase of the area of the deck would be
Increase / initial area × 100.
20/160 × 100 = 12.5℅