Answer: the slope of the line is 2
Step-by-step explanation:
The equation of a straight line is represented in the slope intercept form as
y = mx + c
Where
m = slope
c = intercept
The given equation is y = 2x + 4
Comparing it with the slope intercept form given above,
m = 2. Therefore, the slope of the line is 2
Which of the following inequalities matches the graph below?
(A) The correct inequality is not listed.
(B) 5x + y ≥ 1
(C) 5x + y ≤ 1
(D) 5x − y ≥ 1
Answer:
The answer to your question is letter A
Step-by-step explanation:
Process
1.- Find two points of the line
A (1, 4) B ( -1, 5)
2.- Find the slope of the line
[tex]m = \frac{y2 - y1}{x2 - x1}[/tex]
[tex]m = \frac{-5 - 4}{-1 - 1}[/tex]
[tex]m = \frac{-9}{-2} = \frac{9}{2}[/tex]
3.- Find the equation of the line
y - y1 = m(x - x1)
y - 4 = 9/2(x - 1)
2y - 8 = 9x - 9
9x - 2y = - 9 + 8
9x - 2y = - 1
4.- Convert the equation to a inequality,
9x - 2y ≤ -1
You purchase 26 parking hours that you can use the next month to park your food truck at the fair. Weekday hours park $2 per hour and weekend hours cost $10 per hour. You spend a total of $220. How many week day hours did you purchase.
Answer:
Number of week day hours purchased is 5
Step-by-step explanation:
Total number of Parking hours purchased = 26 parking hours
Parking cost on weekdays = $2 per hour
Parking costs on weekends = $10 per hour
Total amount spent on parking = $220.
To Find:
Number of week days purchased = ?
Solution:
Let
The number of week days purchased be x
The number of weekends purchased be y
We know that the total hours purchased is 26
So,
x+y = 26
y = 26-x------------------------------------------------------(1)
Now the total cost is 220
(Total number of weekdays X cost per weekday ) +(Total number of weekends + cost per weekend) =220
Substituting the values
=>[tex]x\times 2 + y \times 10[/tex] = 220
=>[tex]x \times 2 + (26-x) \times 10 =220[/tex]
=>2x + 260 -10x =220
=>260 -8x = 220
=>260 -220 =8x
=>40 = 8x
=>x=[tex]\frac{40}{8}[/tex]
x= 5-------------------------------------------(2)
Now substituting (2) in (1) we get
y= 26-5
y= 21
Inez bought a package of wrapping paper and 4 bows. If she wrapped 4 identical gifts with the cost of the paper and bow, how much did it cost to wrap each gift
Answer: [tex]\$1.99[/tex]
Step-by-step explanation:
The missing figure is attached.
For this exercise you need to analize the information provided.
You can observe in the picture attached that the cost of a package of wrapping paper is $3.76 and each bow costs $1.05.
Since Inez bought 1 package of wrapping paper and 4 bows, you get that the total amount of money she spent was:
[tex]Total=\$3.76+4(\$1.05)\\\\Total=\$7.96[/tex]
According to the data given in the exercise, Inez wrapped 4 identical gifts. So, let be "x" the cost for wrapping each gift.
This is:
[tex]x=\frac{\$7.96}{4}\\\\x=\$1.99[/tex]
1.99
Step-by-step explanation:
There are 42 boys in the six grade the number of girls in the six grade is 56 Emma says the ratio of boys to the number of girls in the six grade is 5:6 is Emma correct
Answer:
no
Step-by-step explanation:
The ratio is ...
boys : girls = 42 : 56 = (14·3) : (14·4) = 3 : 4 . . . . not 5:6
Emma is not correct.
An aircraft carrier made a trip. The trip there took 5 hours and the trip back took 6 hours. It averaged 3 mph faster on the trip there then on the return trip. Find the aircraft carriers speed on the outbound trip.
Answer: The outbound trip is 18 miles per hour
Step-by-step explanation:
Let x represent the speed of the plane.
An aircraft carrier made a trip. Let us assume that this trip was outbound. The trip there took 5 hours.
Distance = speed × time. Therefore
Distance = 5x
The trip back took 6 hours. It averaged 3 mph faster on the trip there then on the return trip. This means that the speed on the trip back is x - 3 mph.
Distance = 6(x-3) = 6x - 18
Since the distance is the same,
5x = 6x - 18
6x - 5x = 18
x = 18
The speed on return or inbound trip would be 18 - 3 = 15 mph
Hector spent $36.75 for 2 dvds that cost the same amount.The sales tax was $2.15.Hector also used a coupon for $1.00 of his purchase. How much did each dvd cost.
Answer:
Each DVD cost for Hector at $17.80.
Step-by-step explanation:
Total Money Spent = $36.75
Number of DVD to buy = 2
Sales tax = $2.15
Amount of Coupon to be used = $1.00
We need to find the cost of each DVD.
Let the Cost of each DVD be 'x'.
Now We can say that Total Money spent on DVD's is equal to Number of DVD to buy multiplied by Cost of each DVD plus Sales Tax minus Amount Coupon used.
Framing in equation form we get;
[tex]2x+2.15-1=36.75[/tex]
Solving the equation to find the value of x we get;
[tex]2x+1.15=36.75\\\\2x=36.75-1.15\\\\2x= 35.6\\\\x=\frac{35.6}{2}= \$17.8[/tex]
Hence Each DVD cost for Hector at $17.80.
What is the area of the shaded portion of the circle?
(5π – 11.6) ft2
(5π – 5.8) ft2
(25π – 11.6) ft2
(25π – 5.8) ft2
Answer:
The first option is the correct one, the area of the shaded portion of the circle is
[/tex](5 \pi -11.6)ft^2[/tex]
Step-by-step explanation:
Let us first consider the triangle + the shadow.
The full area of the circle is the radius squared times pi, so
A=[tex](5 ft)^2 \cdot \pi \\25 ft^2 \cdot \pi[/tex]
Since [tex]\frac{72^{\circ}}{360^{\circ}}=\frac{1}{5}[/tex], the area of the triangle + the shaded area is one fifth of the area of the whole circle, thus
[tex]A_1=\frac{1}{5}25 ft^2 \cdot \pi\\ =5 ft^2 \cdot \pi[/tex]
If we want to know the area of the shaded part of the circle, we must subtract the area of the triangle from [tex]A_1[/tex].
The area of the triangle is given by
[tex]A_{triangle}=\frac{1}{2}\cdot (2.9+2.9)ft \cdot 4 ft\\= 11.6 ft^2[/tex]
Thus the area of the shaded portion of the circle is
[tex]A_1-A_{triangle}=5 \pi ft^2-11.6ft^2\\= (5 \pi -11.6)ft^2[/tex]
Answer:
A
Step-by-step explanation: i did the test and review
A mixture weighing 600kg has two ingredients: sand, cement and stones. There is twice as much cement as sand and three times as much stones as sand. How much cement in the mixture?
Answer:
Step-by-step explanation:
All the masses here are based on the main mass of the sand. So we will call sand "x". If there is two times as much cement as sand, then cement is 2x; if there is three times as much stone as sand, then stone is 3x. All of these added together equal a mass of 600 kg:
x + 2x + 3x = 600 so
6x = 600 and
x = 100 kg
There are 100 kg of sand. That means that there is 200 kg of cement and 300 kg of stone
Answer:
200 kg
Step-by-step explanation:
Total weight of the mixture = 600kg
Let the weight of the cement in the mixture be x kg.
According to the problem statement, there is twice as much cement as sand, therefore the weight of sand relative to cement will be 1/2, i.e.
sand weight = 1/2x =0.5x
Similarly, weight of stone will be three times as much as sand.
Meaning, stone weight = 3*0.5x=1.5x
Total weight of all the components will be
cement weight + sand weight + stone weight =
x + 0.5x + 1.5x = 3x
But 3x = 600,
x = 600/3= 200 kg
A boy thinks he has discovered a way to drink extra orange juice without alerting his parents. For every cup of orange juice he takes from a container of orange juice, he pours one cup of water back into the container. If he completes this process three times on the same container of juice, the resulting mixture will be exactly 50% water and 50% juice. How many cups of orange juice were originally in the container. (P.S ITS NOT 6)
Answer:
x=4.8473 cups
Step-by-step explanation:
Concentration of Liquids
It measures the amount of substance present in a mixture, often expressed as %. If there is an volume x of a substance in a total volume mix of y, the concentration is given by
[tex]\displaystyle C=\frac{x}{y}[/tex]
It we take a sample of that mixture, we must consider that we are getting only the substance, but all the mixture (assumed it has been uniformly mixed). For example, if we take a glass of liquid from a 80% mixture of juice, the glass will also have a 80% of juice.
Let's solve the problem sequentially. At first, let's assume all the container is full of x cups of juice. Its concentration is 100%. Now let's take 1 cup of pure juice and replace it by 1 cup of pure water. The new amount of juice in the container is
x-1 cups of juice.
The new concentration is
[tex]\displaystyle \frac{x-1}{x}[/tex]
The boy takes a second cup of liquid, but this time it's not pure juice, it has a mixture of juice and water with a concentration computed above. Now the amount of juice is
[tex]\displaystyle x-1-\frac{x-1}{x}[/tex] cups of juice.
Simplifying, the cups of juice are
[tex]\displaystyle \frac{\left (x-1\right)^2}{x}[/tex]
The new concentration is
[tex]\displaystyle \frac{\left (x-1\right)^2}{x^2}[/tex]
For the third time, we now have
[tex]\displaystyle \frac{\left (x-1\right)^2}{x}-\frac{\left (x-1\right)^2}{x^2}[/tex] cups of juice.
Simplifying, the final amount of juice is
[tex]\displaystyle \frac{\left (x-1\right)^3}{x^2}[/tex]
And the final concentration is
[tex]\displaystyle \frac{\left (x-1\right)^3}{x^3}[/tex]
According to the conditions of the question, this must be equal to 50% (0.5)
[tex]\displaystyle \frac{\left (x-1\right)^3}{x^3}=0.5[/tex]
Taking cubic roots
[tex]\displaystyle \sqrt[3]{\frac{\left (x-1\right)^3}{x^3}}=\sqrt[3]{0.5}[/tex]
[tex]\displaystyle \frac{\left (x-1\right)}{x}=\sqrt[3]{0.5}[/tex]
Operating and joining like terms
[tex]\displaystyle x-\sqrt[3]{0.5}\ x=1[/tex]
Solving for x
[tex]\displaystyle x=\frac{1}{1-\sqrt[3]{0.5}}[/tex]
[tex]x=4.8473\ cups[/tex]
Let's test our result
Final concentration:
[tex]\displaystyle \frac{\left (4.8473-1\right)^3}{4.8473^3}=0.5[/tex]
A.J. has 20 jobs that she must do in sequence, with the times required to do each of these jobs being independent random variables with mean 50 minutes and standard deviation 10 minutes. M.J. has 20 jobs that he must do in sequence, with the times required to do each of these jobs being independent independent random variables with mean 52 minutes and standard deviation 15 minutes.
(a) Find the probability that A.J. finishes in less than 900 minutes.
(b) Find the probability that M.J. finishes in less than 900 minutes.
(c) Find the probability that A.J. finishes before M.J.
Final answer:
To find the probability that A.J. and M.J. finish their jobs within a certain time, we need to calculate the z-score for the given values and use a standard normal distribution table or a calculator to find the probability.
Explanation:
(a) To find the probability that A.J. finishes in less than 900 minutes, we need to calculate the z-score (standard score) for the value 900 using the formula: z = (x - mean) / standard deviation. In this case, x = 900, mean = 50 minutes, and standard deviation = 10 minutes. Once we have the z-score, we can use a standard normal distribution table or a calculator to find the probability.
(b) To find the probability that M.J. finishes in less than 900 minutes, we use a similar process as in part (a), but with different mean and standard deviation values. In this case, x = 900, mean = 52 minutes, and standard deviation = 15 minutes.
(c) To find the probability that A.J. finishes before M.J., we can compare the means of the two distributions. Since A.J.'s mean is lower than M.J.'s mean, the probability of A.J. finishing before M.J. is higher.
The probability of meeting a random person who has the same birthday as you is 1/365 , which is approximately 0.27%. What is the probability that it takes meeting more than 40 people before you meet someone who has the same birthday as you?
Answer:
89.6%
Step-by-step explanation:
The probability a random person shares your birthday is 1/365, or 0.27%. That means the probability that they don't share your birthday is 364/365, or 99.73%.
So the probability that you meet 40 people who don't share your birthday is:
P = (364/365)^40
P = 89.6%
The probability that it takes meeting more than 40 people before you meet someone who shares the same birthday as you is roughly 10.13% given that the probability of meeting a random person who has the same birthday as you is approximately 0.27%. This is calculated as the complement of the probability that we don't encounter a matching birthday in 40 people.
Explanation:The probability of meeting a random person who shares the same birthday as us is 1/365, approximately a 0.27% chance. Now, to calculate the probability that it requires meeting more than 40 people before finding someone who has the same birthday is essentially the complement of the probability that we find someone with the same birthday in 40 people or less.
We can start by calculating the probability of not meeting someone with the same birthday in one encounter which is 364/365 (approximately 0.9973). The probability that we don’t encounter a matching birthday in 40 people is (364/365)^40 (approximately 0.8987). Subsequently, The probability that it takes meeting more than 40 people before you meet someone who has the same birthday is the complement of this probability, which is 1 - 0.8987 = 0.1013 or approximately a 10.13% chance.
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How many ways can you choose 4 cookies from a cookie jar containing 25 cookies of all the same type?
Answer:
Only one.
Step-by-step explanation:
Given that there are 25 cookie of the same type in a cookie jar.
We have to select 4 cookies from these 25.
Since they are all the same type, they are identical.
The question is
How many ways can you choose 4 cookies from a cookie jar containing 25 cookies of all the same type?
There is no difference if we take any four cookies from these 25.
Hence no of different ways = 1
Only one is the answer.
Answer:
Step-by-step explanation:
25 P4=25×24×23×22=303600
After collecting eggs from his chickens, Dale puts the eggs into cartons to sell. Dale fills 151515 cartons and has 777 eggs left over. Each carton holds 121212 eggs. How many eggs did Dale collect?
Answer:
187 eggs
Step-by-step explanation:
Correct Question:
After collecting eggs from his chickens, Dale puts the eggs into cartons to sell. Dale fills 15 cartons and has 7 eggs left over. Each carton holds 12 eggs. How many eggs did Dale collect?
Dale filled up each carton with 12 eggs (that's the full capacity.
Dale filled up 15 full cartons.
So, the eggs he collected in carton:
15 * 12 = 180 eggs
He still had 7 left over, so total number of eggs that Dale collected is:
180 + 7 = 187 eggs
Lily and Elsa are both college students.Before mom gave them this months allowance lily had $750 and Elsa had &215.After mom gave each girl an equal amount of money for this months allowance, lily had twice as much money as Elsa.How much did mom give to each girl .
After mom gave each girl an equal amount of money for this months allowance, lily had twice as much money as Elsa. Thus mom gave $ 320 to each girl
Solution:
Given that Lily and Elsa are both college students
Before mom gave them this months allowance lily had $750 and Elsa had &215
Amount (in dollars) with Lily and Elsa already is given as:
amount with Lily = $ 750
amount with Elsa = $ 215
After mom gave each girl an equal amount of money for this months allowance, lily had twice as much money as Elsa
Let "x" be the equal amount of money which mom gave to Lily and Elsa
Now amount with Lily and Elsa after mom gave equal amount is:
amount with Lily = amount with Lily already + x
amount with Lily = 750 + x
amount with Elsa = amount with Elsa already + x
amount with Elsa = 215 + x
Given that lily had twice as much money as Elsa
Amount with lily = 2(amount with elsa)
750 + x = 2(215 + x)
750 + x = 430 + 2ax
2x - x = 750 - 430
x = 320
Therefore mom gave $ 320 to each girl
First two need to be answered and last two need to be checked. (If you don’t see the attachments wait..)
Answer:
∠PQR measures 40°x = 7They form concentric circlesYes, according to the triangle inequalityStep-by-step explanation:
1. ∠PQR is an alternate interior angle with the one marked 40°, so it has the measure 40°.
∠PRQ is an alternate interior angle with the one marked 60°, so it has the measure 60°.
Among the answer choices, the one describing ∠PQR as 40° is the only correct one.
__
2. ∠BAD = 2×∠BAE
130 = 2(9x + 2) . . . substitute the given expressions
65 = 9x + 2 . . . . . divide by 2
63 = 9x . . . . . . . . .subtract 2
7 = x . . . . . . . . . . . .divide by 9
__
3. Think again. Anything being rotated follows a circular path. Circular paths with different radii and the same center are concentric circles.
Straight lines connecting the pre-image and image points will be parallel (and different lengths), but the question is concerned with paths, not endpoints.
Why the path is described as "concentric circles," we're not sure. The path for a 90° rotation will be a 90° arc. It is perfectly reasonable to describe the paths of the two points as concentric arcs, rather than concentric circles. See the attachment.
__
4. Correct. The triangle inequality requires the sum of the two shortest side lengths exceed the longest side length. Here, that means 2+5 > 5 (true). The "toothpicks" meet the requirements of the triangle inequality, so will make a triangle.
The "triangle sum theorem" has to do with angles, not side lengths.
Solve the equation by factoring: x^2 + 13x = -42
Answer:
-6 and -7 are the roots
Step-by-step explanation:
The quadratic equation given is:
[tex]x^{2}+13x=-42\\Taking\ -42\ to\ left\ hand\ side\ we\ get\\x^{2} +13x+42=0[/tex]
We can factorise the equation as:
[tex]x^{2}+6x+7x+42=0\\(x^{2}+6x)+(7x+42)=0\\[/tex]
Taking x common from the first bracket and 7 common from the second bracket we get:
[tex]x(x+6)+7(x+6)[/tex]
Taking (x+6) common from both terms we get:
[tex](x+6)(x+7)=0[/tex]
x= -6 or x=-7
Hence -6 and -7 are the roots of the given quadratic equation.
A fast-food restaurant runs a promotion in which certain food items come with game pieces. According to the restaurant, 1 in 4 game pieces is a winner. If Jeff gets 4 game pieces, what is the probability that he wins exactly 1 prize?
(a) 0.25
(b) 1.00
(c) (41)(0.25)1(0.75)3
(d) (41)(0.25)3(0.75)1
(e) (0.75)3(0.25)1
Answer:
(c) [tex]\left\ ({{4} \atop {1}} )\right.[/tex] [tex]0.25^{1} 0.75^{3}[/tex]
Step-by-step explanation:
As given in the statement, we have:
Out of 4 games pieces, 1 is winner.
Probability to win =p= [tex]\frac{1}{4}[/tex]
Jeff has game pieces = n = sample size = 4
As we need to find the probability that he wins exactly 1 prize, we will use binomial probability here :
[tex]P (X = k) = \left\ ({{n} \atop {k}} )\right. p^{k} (1-p)^{n-k} \\[/tex]
Evaluating at k=1, (k=1 as we need to find probability for exactly 1 prize won)
put n = 4, p =[tex]\frac{1}{4}[/tex]
P (X = 1) =[tex]\left\ ({{4} \atop {1}} )\right. 0.25^{1} (1-0.25)^{4-1}[/tex]
P =[tex]\left\ ({{4} \atop {1}} )\right. 0.25^{1} (0.75)^{3}[/tex]
Which is the probability that he wins exactly 1 prize and is option c.
Probability (Jeff wins 1 price in 4 game pieces) = C] [tex](4 c 1)(0.25)^1(0.75)^3[/tex]
Important Information : Probability (Winning a price) = 1 / 4 = 0.25
Probability (Not winning price) = 1 - Pr (Winning Price) = 1 - 0.25 = 0.75
Using Binomial Probability : Pr (X = r) = [tex]N c r . P^r . Q^(n-r)[/tex] .
Here N = number of trials (4 game pieces here) , P = Probability of Success (of winning price = 0.25) , R = Number of Success (1 price) , Q = Probability of failure (of not winning price = 0.75) ,
So, Probability = [tex]4 c 1 (0.25)^1 (0.75)^3[/tex]
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If vertices of a triangle are A (5, 0), B (x, y) and C (25, 0), what is the area of the triangle?(1) |x| = y = 10(2) x = |y| = 10
Answer:
[tex]10|y|[/tex]
Step-by-step explanation:
We have been given that the vertices of a triangle are A (5, 0), B (x, y) and C (25, 0). We are asked to find the area of the given triangle.
We will use area formula for triangle with vertices A, B and C as given below:
[tex]|\frac{A_x(B_y-C_y)+B_x(C_y-A_y)+C_x(A_y-B_y)}{2}|[/tex]
Upon substituting the given coordinates of points A, B and C in above formula, we will get:
[tex]|\frac{5(y-0)+x(0-0)+25(0-y)}{2}|[/tex]
[tex]|\frac{5(y)+x(0)+25(-y)}{2}|[/tex]
[tex]|\frac{5y+0-25y}{2}|[/tex]
[tex]|\frac{-20y}{2}|[/tex]
[tex]|-10y|[/tex]
[tex]10|y|[/tex]
Therefore, the area of the given triangle would be [tex]10|y|[/tex].
Need help with please show me how to get the answer
Answer:
? = 47°
Step-by-step explanation:
The angle marked B at the intersection of the secants is half the difference of the arcs they intercept.
∠B = (DE -AC)/2 = (142° -48°)/2 = 47°
The unknown angle is 47°.
Which Of the following represnt the range of the function y=-1/2(x+10)^2+14?
1) y>=-5 2)y>=10 3) y<=7 4) y<=14, Explain plz
Answer:
The answer is option is (4) y ≤ 14
Step-by-step explanation:
The given function, y = - 0.5[tex](x + 10)^{2} + 14[/tex]
We have to find the range of this function. If we take the first part of the function alone we can see that it is always negative or zero. So the maximum value of the function is 14.
This happens when we make the first part zero and for that we put x = -10.
So the maximum value of the function occurs at x = -10 and that value is y = 14.
Hence the range is y ≤ 14.
The answer is option is (4) y ≤ 14
The formula to determine energy is uppercase E = one-half m v squared. What is the formula solved for v?
Answer:
Step-by-step explanation:
[tex]E=\frac{1}{2}mv^2[/tex]
All the variables on the right are being multiplied together then the whole mess is being divided by 2. Let's get rid of the 2 first. The undoing of division is multiplication, so we will begin by multiplying both sides by 2 to get
[tex]2E=mv^2[/tex]
Next we will move the m. The undoing of multiplication is division. So we divide both sides by m to get
[tex]\frac{2E}{m}=v^2[/tex]
The undoing of a square is to take the square root, so we will do that to both sides giving us, finally
[tex]\sqrt{\frac{2E}{m} }=v[/tex]
Answer:
d
Step-by-step explanation:
Which explicit rule represents the following arithmetic sequence: 7, 11, 15, 19, 23,...
1. an=3+4n
2. an=7+4n
3. an= 4+7n
4. an=7x4^n-1
｡☆✼★ ━━━━━━━━━━━━━━ ☾
The correct option would be A. an = 3 + 4n
You may test my substituting values in:
3 + 4(1) = 7
3 + 4(2) = 11
etc
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Stay Brainly! ヅ
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Answer:
a
Step-by-step explanation:
Liam uses 2 quarts of yellow paint and adds 3 1/4 Jars of blue paint.Evan uses 1/2 quarts of yellow paint and adds 5 1/2 of red paint.They end up with the same volume of paint.write an equation to show it.
Answer:
2 + (13/4)x = 1/2 + (11/2)y
Step-by-step explanation:
Let each jar of paint used by Liam be x
Let each jar of paint used by Evan be y.
Liam uses 2 quarts of yellow paints and adds 3 1/4 jars of blue paint. so we have
2 + 3 1/4x
= 2 + (13/4)x
Since Evan also uses 1/2 quarts of yellow paints and add 5 1/2 jar of red paint, we have
1/2 + 5 1/2y
= 1/2 + (11/2)y
Since they end up with the same volume of paint, we have
2 + (13/4)x = 1/2 + (11/2)y
Final answer:
The equation to show that Liam and Evan end up with the same volume of paint, considering all quantities are in quarts, is 2 + 3.25 = 0.5 + 5.5.
Explanation:
To solve the problem where Liam and Evan end up with the same volume of paint, we can write an equation that sets the total volume of paint used by each person equal to each other. Since Liam uses 2 quarts of yellow paint and adds 3 1/4 (which is equivalent to 3.25) jars of blue paint and Evan uses 1/2 quart of yellow paint and adds 5 1/2 (equal to 5.5) jars of red paint, the equation comparing their total amounts of paint in quarts can be written as:
2 + 3.25 = 0.5 + 5.5
Before writing this equation, we need to ensure that both expressions represent quantities in the same unit. We confirm that all the amounts are given in quarts, so there is no need to convert units in this case. The equation illustrates that the total volume of paint used by Liam and Evan is equal.
A researcher for an airline interviews all of the passengers on five randomly selected flights.
Identify which sampling technique is used.
a. Stratified.
b. Convenience.
c. Cluster.
d. Random
Answer
Cluster sampling. See explanation below.
Step-by-step explanation:
For this case they not use random sampling since we are selecting people from flights. Because we select just 5 random flights.
Is not stratified sampling since we don't have strata clearly defined on this case, and other important thing is that in order to apply this method we need homogeneous strata groups and that's not satisfied on this case.
Is not convenience sampling because they NOT use a non probability method in order to select the people from the flights.
So then the only possible method is cluster sampling since we have clusters clearly defined (Passengers from the airlines), and we satisfy the condition of homogeneous characteristics on the clusters and an equal chance of being a part of the sample, since we are selecting RANDOMLY, the 5 flights to take the information.
An investor just purchased a rectangular 2-acre retail lot for $250 a frontage foot. If she paid $100,000 total, what was the depth of the lot?
a. 400’ b. 250 c. 871’ d. 218’
Answer:
[tex] Depth = \frac{Area}{# frontage feet}= \frac{87120 ft^2}{400}=217.8 \approx 218[/tex]
So for this case the best answer would be:
d. 218’
Step-by-step explanation:
Previous concepts
Foot front : "Is a foot measured along the front of a piece of property".
Solution to the problem
For this case we need to begin finding the number of frontage feet, with the following formula:
[tex]Frontage fronts=\frac{Amount paid}{Unitary price}[/tex]
And for this case if we replace the values given we got:
[tex]Frontage fronts=\frac{100000}{250}=400 fromtage foot[/tex]
Now we need to convert the area to square feet. And we know that:
[tex] 1 acre= 43560 ft^2[/tex]
And converting we got: [tex]2 acre *\frac{43560 ft^2}{1 acre}=87120 ft^2[/tex]
Now we can divide the total area by the total of frontage feer and we got:
[tex] Depth = \frac{Area}{# frontage feet}= \frac{87120 ft^2}{400}=217.8 \approx 218[/tex]
So for this case the best answer would be:
d. 218’
Last year, a bakery sold w loaves of bread. This year, the bakery sold three more than twice the number of loaves of bread sold last year. If next year the bakery plans on selling twice the number of loaves of bread sold this year, how many loaves of bread does the bakery expect to sell next year?
Answer:
Bakery will sell [tex]4w+6[/tex] loaves of bread next year.
Step-by-step explanation:
Given:
Number of loaves of bread sold last year = 'w'
Now Given:
This year, the bakery sold three more than twice the number of loaves of bread sold last year.
Framing in equation form we get
Number of loaves of bread sold this year = [tex]2w+3[/tex]
Also Given:
next year the bakery plans on selling twice the number of loaves of bread sold this year.
framing in equation form we get;
Number of loaves of bread bakery will sell next year = [tex]2(2w+3) = 4w+6[/tex]
Hence Bakery will sell [tex]4w+6[/tex] loaves of bread next year.
The bakery expects to sell 4w + 6 loaves of bread next year.
Let's break down the problem step by step:
1. Number of loaves sold this year:
- Last year, the bakery sold w loaves of bread.
- This year, the bakery sold three more than twice the number of loaves sold last year.
- Therefore, the number of loaves sold this year is:
[tex]\[ 2w + 3 \][/tex]
2. Number of loaves expected to be sold next year:
- Next year, the bakery plans to sell twice the number of loaves sold this year.
- Therefore, the number of loaves expected to be sold next year is:
[tex]\[ 2 \times (2w + 3) \][/tex]
3. Simplify the expression:
- Distribute the 2 in the expression:
[tex]\[ 2 \times (2w + 3) = 2 \times 2w + 2 \times 3 = 4w + 6 \][/tex]
Therefore, the bakery expects to sell 4w + 6 loaves of bread next year.
A manufacturing process produces a critical part of average length 120 millimeters, with a standard deviation of 3 millimeters. All parts deviating by more than 5 millimeters from the mean must be rejected. What percentage of the parts must be rejected, on average? Assume a normal distribution.
Answer:
9.692%
Step-by-step explanation:
We have been given that a manufacturing process produces a critical part of average length 120 millimeters, with a standard deviation of 3 millimeters. All parts deviating by more than 5 millimeters from the mean must be rejected.
5 millimeters below mean would be [tex]115[/tex] and 5 millimeters above mean would be [tex]125[/tex].
Corresponding z values for 115 and 125 would be:
[tex]z=\frac{x-\mu}{\sigma}[/tex]
[tex]z=\frac{115-120}{3}[/tex]
[tex]z=\frac{-5}{3}[/tex]
[tex]z=-\frac{5}{3}[/tex]
[tex]z=\frac{125-120}{3}[/tex]
[tex]z=\frac{5}{3}[/tex]
Now, we need to find [tex]P(z<-\frac{5}{3})+P(z>\frac{5}{3})[/tex] using normal distribution table.
[tex]P(z<-\frac{5}{3})+P(z>\frac{5}{3})=P(z<-1.66)+P(z>1.66)[/tex]
We know that [tex]P(z>1.66)=1-P(z<1.66)[/tex].
[tex]P(z>1.66)=1-0.95154 [/tex]
[tex]P(z>1.66)=0.04846[/tex]
[tex]P(z<-\frac{5}{3})+P(z>\frac{5}{3})=0.04846+0.04846[/tex]
[tex]P(z<-\frac{5}{3})+P(z>\frac{5}{3})=0.09692[/tex]
Now, we need to convert 0.09692 into percentage as:
[tex]0.09692\times 100\%=9.692\%[/tex]
Therefore, 9.692% of parts must be rejected on average.
About 0% of the parts would be rejected, on average.
Z scoreThe z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by:
z = (x - μ) / σ
where μ is the mean, x = raw score and σ is the standard deviation.
Given μ = 120, σ = 3. For z > 5:
P(z > 5) = 1 - P(z < -38.3) = 1 - 1 = 1 = 0%
About 0% of the parts would be rejected, on average.
Find out more on Z score at: https://brainly.com/question/25638875
Drag each tile to the correct location on the table. Each tile can be used more than once, but not all tiles will be used.
Choose the justification for each step in the solution to the given equation.
Answer:
The answer to your question is below
Step-by-step explanation:
1) Given
2) Subtraction property of equality (because we are subtracting the same quantity on both sides).
3) Simplification
4) Subtraction property of equality ( because we are subtracting the same quantity on both sides).
5) Simplification
6) Multiplication property of equality (because we are multiplying the same quantity on both sides).
7) Simplification
One line of text on a page uses about 4/15 of an inch. There are 0.5-inch margins at the top and bottom of a page. Write and solve an inequality to find the number of lines that can be typed on a page that is 17 inches long.
Answer:
60 lines can be typed in the page
Step-by-step explanation:
Given:
Length of the page = 17 inches
Length of the margin = 0.5-inch
length of one line = 4/15
To Find:
The number of lines that can be typed on a page
Solution:
Let the number of line that can be typed be n
then
n <= [tex]n \leq \frac{\text { total length of the page}-\text {top margin} - \text{ bottom margin}}{\text{size of each line }}[/tex]
the top and bottom margins are 0.5 inches each
so we will be having
=> [tex]n \leq \frac{17 -0.5-0.5}{\frac{4}{15}}[/tex]
=>[tex]n \leq \frac{16}{\frac{4}{15}}[/tex]
=>[tex]n \leq \frac{16\times 15}{4}[/tex]
=>[tex]n \leq\frac{240}{4}[/tex]
=> [tex]n \leq 60[/tex]
In the Parallelogram below, x = ?
Answer:
12
Step-by-step explanation:
3x + 7 = 5x - 17
5x - 3x = 7 + 17
2x = 24
x = 12