Answers
ANSWER
1 bell shape
2 to find probability when sampling
EXPLANATION
1 In a normal distribution, the mode,mean and median are equal.
As a result, the distribution is neither skewed to the right or left.
The shape of the normal distribution looks like a bell.
That is why it is also called the bell curve.
2. The area under the normal curve is 1.
The line of symmetry of the bell shaped distribution divides it into two halves with area 0.5 each.
The normal curve is therefore used to find the probabilities of a sample distributions.
Related Questions
Which expressions are equivalent to (k^(1/8))^(−1) ?
choose all answers that apply:
a. (k^(-1))^(1/8)
b. (8_/`k)^(-1)
c. k^(-1/8)
d. none of the above
* _/` is a radical with 8 as the index and k as the radicand
Answers
The first option is correct: we have
[tex]\left(k^{\frac{1}{8}}\right)^{-1} = \dfrac{1}{k^{\frac{1}{8}}} = \dfrac{1}{\sqrt[8]{k}},\quad \left(k^{-1}\right)^{\frac{1}{8}} = \left(\dfrac{1}{k}\right)^{\frac{1}{8}} = \dfrac{1}{\sqrt[8]{k}}[/tex]
The second option is also correct, because it simply applies the definition
[tex]k^{\frac{1}{n}} = \sqrt[n]{k}[/tex]
The third option is also correct, because it applies the rule
[tex](a^b)^c = a^{bc}[/tex]
The expressions equivalent to (k^(1/8))^(-1) are (k^(-1))^(1/8) and k^(-1/8), matching options a and c from the given choices. These are determined by correctly applying the exponent multiplication rule.
Explanation:The student is dealing with an expression involving exponents and radicals, specifically focused on understanding the rules for combining and simplifying these expressions. The expression in question is (k^(1/8))^(-1), which we'll simplify in a step-by-step fashion.
The rule of exponents we need to apply here is (a^m)^n = a^(m*n). When applying this rule to the given expression we get:
(k^(1/8))^(-1) = k^(1/8 * -1)
Simplify the exponent:
k^(1/8 * -1) = k^(-1/8)
So, the equivalent expression is:
k^(-1/8)
Now let's examine the choices given:
Therefore, the correct answers are a and c.Use substitution to solve the linear system of equations.
equations:
6x + 4y = 14
y = 5
Answers
Answer:
Step-by-step explanation:
6x+4y=14
y=5
6x+4(5)=14
6x+20=14
6x=-6
x=-1
Step 1: Where you see a y in the equation 6x + 4y =14 replace it with 5. This will help you find x
6x + 4(5) = 14
6x + 20 = 14
Step 2: Combine like terms by subtracting 20 to both sides
6x + (20-20) = 14-20
6x = -6
Step 3: Isolate x by dividng 6 to both sides
[tex]\frac{6x}{6} = \frac{-6}{6}[/tex]
x = -1
Point of intersection of these two linse is ( -1 , 5 )
Hope this helped!
budget planning
Ryan is trying to save money to buy a home. He wants to write out a budget for himself so he can put some money into savings each month
Answers
he has to make a bank account and it'll help in the long run
What verbal expression is the same as the algebraic expression below?
8 - 3x
Question 4 options:
a three times a number minus eight
b three minus eight times a number
c eight times a number minus three
d eight minus three times a number
Answers
Answer:
D
Step-by-step explanation:
3x=3(x)
x is an unknown number which there is no value.when there is number next to it.it will become times
the total surface area of a cone that has a base radious of 7cm is 417.8cm2 . calculate its slant height
Answers
Answer:
12 cm
Step-by-step explanation:
The total surface area of the cone = area of base + area of curved surface
Subtract the base area from total area, that is
πrs = area - πr²
r is the radius and s the slant height
πrs = 417.8 - (π × 7²) = 263.86
Divide both sides by πr
s = [tex]\frac{263.86}{7\pi }[/tex] ≈ 12 cm
NEED HELP FAST!!!!!!!!!!
Answers
Answer:
h = 10 m
Step-by-step explanation:
We are given the following formula of the area of a trapezoid:
[tex]A=\frac{1}{2} (b+c)h[/tex]
where [tex]h[/tex] is the height of the trapezoid and [tex]b[/tex] and [tex]c[/tex] are its bases.
Re-arranging the given formula to solve for h:
[tex]A=\frac{1}{2} (b+c)h[/tex]
[tex]2A=(b+c)h[/tex]
[tex]h=\frac{2A}{(b+c)}[/tex]
Finding the height of the trapezoid given the bases 20 m, 7 m and area 135m^2.
[tex]h=\frac{2 \times 135}{(7+20)}[/tex]
h = 10 m
ANSWER
h=10m
EXPLANATION
The given formula is
[tex]A = \frac{1}{2} (b + c)h[/tex]
We multiply through by 2 to get,
[tex]2A =(b + c)h[/tex]We divide both sides by (b+c) to get,
[tex] \frac{2A}{b + c}=h[/tex]
Or
[tex]h=\frac{2A}{b + c} [/tex]
[tex]h=\frac{2 \times 135}{20 + 7} [/tex]
We simplify to get,
[tex]h=\frac{270}{27} [/tex]
Therefore
[tex]h = 10[/tex]
Now if b=20, c=7 and A=135, then,
Select the correct answer.
What is the equation of a line that passes through (7.8) and has a slope of -3?
A.
y=-3x + 29
B.
c.
D.
y = 3x + 13
y = (1)/(3)x-29
y = -(1)/(3)x-13
Reset
Next
2019 EdmontumAllah
Answers
Answer:
A. y=-3x + 29
Step-by-step explanation:
The slope shows up in the equation as the coefficient of x. Only answer choice A has an x-coefficient of -3. It also happens to describe a line that goes through (7, 8).
y = -3x +29
___
Check
y = -3·7 +29 = -21 +29 = 8 . . . . as required
Answer:
A
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
here m = - 3, so
y = - 3x + c ← is the partial equation of the line
To find c substitute (7, 8) into the partial equation
8 = - 21 + c ⇒ c = 8 + 21 = 29
y = - 3x + 29 → A
Solve the following equation. Then place the correct number in the box provided. x/1.2=15
Answers
Answer:
x = 18.
Step-by-step explanation:
x / 1.2 = 15
To isolate x we multiply both sides of ther equation by 1.2:
x = 15 * 1.2
x = 18 (answer).
For this case we must find the value of the variable "x" of the following equation:
[tex]\frac {x} {1.2} = 15[/tex]
To do this, we must multiply both sides of the equation by "1.2":
[tex]\frac {x} {1.2} * 1.2 = 15 * 1.2\\x = 18[/tex]
Thus, the value of the variable x is 18.
Answer:
[tex]x = 18[/tex]
find the missing term of each pair of equivalent ration 125:80= ____:48
Answers
Answer:
The answer would be 75 because of cross multiplication.
Answer:
75
Step-by-step explanation:
125/80=1.5625
48x1.5625=75
8+4(2x+7)=2(2+6x) and check it please
Answers
8 + 4 (2x+7) = 2 (2+6x), 4 (2x+7) + 8 = 2 (6x+2), (4 x 2x + 4x7) + 8 = 2 (6x+2)
x = 9
how to simplify this algebra
Answers
Negative exponents mean that the base is on the wrong side of the fraction line
A is correct
Answer:
[tex]\large\boxed{A.\ \dfrac{1}{x^2y^2}}[/tex]
Step-by-step explanation:
[tex]\dfrac{x^0y^{-3}}{x^2y^{-1}}=\dfrac{1\cdot\dfrac{1}{y^3}}{x^2\cdot\frac{1}{y}}=1\cdot\dfrac{1}{y^3}\cdot\dfrac{1}{x^2}\cdot\dfrac{y}{1}=\dfrac{1}{y^2x^2}[/tex]
[tex]\text{Used}\\\\a^0=1\ \text{for all real numbers except 0}\\\\a^{-n}=\dfrac{1}{a^n}[/tex]
An isosceles right triangle has sides that are x+2 units long and a hypotenuse that is 8 units long. What is the length of the missing sides of the triangle
Answers
Answer:
In an isosceles right triangle, the hypotenuse is larger than the sides by a factor of the square root of 2.
So, if the hypotenuse is 8 then the sides are 8 / (sq root of 2) = 5.6568542495
Step-by-step explanation:
Pamela is 11 years younger than Jerry the sum of their ages is 63 what is Jerry's age?
Answers
Answer:
37
Step-by-step explanation:
Pamela's age can be repesented with the variable, p .
Pamela is 11 years younger than Jerry. Jerry's age can be represented with the expression p + 11.
So,
Pamela: p
Jerry: p + 11
If their total, combined age is 63, the following equation can be used to represent their ages.
p + (p + 11) = 63
Now, solve.
p + (p + 11) = 63
p + p + 11 = 63
2p + 11 = 63
2p = 52
p = 26
Now, remember that 26 is how old Pamela is. We're looking for Jerry's age.
We established before that Jerry's age can be represented with the expression p + 11.
We know what p is, so substitute the value of p into the equation.
p + 11
26 + 11
37
So, Jerry is 37 years old.
If you'd like to double check your answer, add 37 [Jerry's age] and 26 [Pamela's age] and you get 56.
I hope this helps you!!! :)
Alan and Samuel each have a 30-year mortgage. Both mortgages were approved at the same time. Alan pays 5 percent interest, while Samuel only pays 3.5 percent.
If Alan and Samuel are the same age and make the same amount of money, why is Alan paying more in interest?
a) Samuel has a better credit score, so his interest rate is lower.
b) Samuel has more credit cards, so he recieves a better rate.
c) Alan has a better credit score, so his interest rate is higher.
d) Alan has a longer credit history, so he recieves a worse rate.
Answers
The answer would be c
Answer:
a) Samuel has a better credit score, so his interest rate is lower.
Step-by-step explanation:
Alan and Samuel both are same age and make same amount of money.
They both have a 30-year mortgage. But Alan pays 5 percent interest, while Samuel only pays 3.5 percent.
There correct answer here will be - Samuel has a better credit score, so his interest rate is lower.
When a person has a good credit rating, that means he has never defaulted any payment and has always paid his loan on time. He must be a trusted customer for the bank that is why he got a lower interest rate than Alan.
please someone help me
Answers
Answer:
it intercepts the y-axisStep-by-step explanation:
Look at the picture.
The graph of an exponential function [tex]f(x)=a^x[/tex], a > 0
is above the x-axis and lie in I and II Quarter.
Simplify:
(1/2k)(4k) + 12 =
if i put choices you guys would just guess
Answers
Answer:
2k^2 + 12.
Step-by-step explanation:
(1/2k)(4k) + 12
= 1/2 *4 k^2 + 12
= 2k^2 + 12.
Answer:
Step-by-step explanation:
1/2k (4k) + 12= 0
4k/2k + 12 = 0
2k + 12 = 0
2k = -12
Divide by 2 on both sides
K = -6
Which functions have a y-intercept that is greater than the y-intercept of the function g(x) = |x + 3| + 4? Check three options.
f(x) = –2 (x – 8)2
h(x) = –5 |x| + 10
j(x) = –4(x + 2)2 + 8
k(x)=1/4(x-4)^2+4
m(x)=1/4 |x-8| +6
Answers
Answer:
h(x) = –5 |x| + 10
k(x)=1/4(x-4)^2+4
m(x)=1/4 |x-8| +6
Step-by-step explanation:
The given function is:
g(x) = |x + 3| + 4
At y-intercept x=0,
g(0) = |0 + 3| + 4
g(0) = 3 + 4=7
The y-intercept of this function is 7.
We look for the functions with y-intercepts greater than 7.
[tex]f(x)=-2(x-8)^2[/tex]
[tex]f(0)=-2(0-8)^2[/tex]
[tex]f(0)=-128[/tex]
h(x) = –5 |x| + 10
h(x) = –5 |0| + 10=10
[tex]j(x)=-4(x+2)^2+8[/tex]
[tex]j(0)=-4(0+2)^2+8=-8[/tex]
[tex]k(x)=\frac{1}{4}(x-4)^2+4[/tex]
[tex]k(0)=\frac{1}{4}(0-4)^2+4=8[/tex]
m(x)=1/4 |x-8| +6
m(0)=1/4 |0-8| +6=8
Answer with explanation:
The given function is
g(x)=|x+3|+4
The meaning of Y intercept is the distance between origin and Point where the curve cuts Y axis.
In , g(x), put x=0
g(0)=|0+3|+4
=3+4
=7
So, Length of Y intercept =7 unit
2.
f(x)=-2(x-8)²
f(0)=-2×(0-8)²
= -2 × 64
= -128
Length of Y intercept =-128 unit
3.
h(x)=-5|x|+10
h(0)=-5 × |0| +10
=10
Length of Y intercept =10 unit
4.
j(x)=-4(x+2)²+8
j(0)=-4×(0+2)²+8
=-4 × 4+8
= -16 +8
= -8
Length of Y intercept =-8 unit
4.
[tex]\rightarrow k(x)=\frac{1}{4} \times (x-4)^2+4\\\\\rightarrow k(0)=\frac{1}{4} \times (0-4)^2+4\\\\\rightarrow k(0)= 4+4\\\\=8[/tex]
Length of Y intercept =8 unit
5.
[tex]\rightarrow m(x)=\frac{1}{4} \times |x-8|+6\\\\\rightarrow k(0)=\frac{1}{4} \times |0-8|+6\\\\\rightarrow k(0)= 2+6\\\\=8[/tex]
Length of Y intercept =8 unit
⇒ h(x),k(x) and m(x) has y intercept greater than y-intercept of the function g(x) = |x + 3| + 4.
Can someone help me????
Answers
Answer:
in order
Step-by-step explanation:
1) 1
2) 5
3) 2
You are looking for the x values of this "rule". It gives you the y-values so all you have to do is plug the y-values into the rule and solve for x
y = 4 so...
4 = x + 3
4 - 3 = x + (3-3)
1 = x + 0
x = 1
When y is 4 then x is 1
y = 8 so...
8 = x + 3
8 - 3 = x + (3 - 3)
x = 5
When y is 8 then x is 5
y = 5 so...
5 = x + 3
5 - 3 = x + (3 - 3)
2 = x + 0
x = 2
When y is 5 then x is 2
Hope this helped!
~Just a girl in love with Shawn Mendes
A middle school student is doing a math project in which she has to make a graph of the different ways students get to school. To collect her data, she stands under the bus canopy and asks 100 students how they normally get to school. Is her data valid? Why or why not?
Answers
Answer:no
Step-by-step explanation: if they are all under the bus canopy they obviously take the bus make the data bias
Which inequality is true for x = 2? A) 6x + 20 < 29 B) 7x − 10 < 11 C) 14x + 10 < 37 D) 15x − 18 < 12
Answers
For this case we must evaluate [tex]x = 2[/tex] in each of the inequalities and verify if the inequality is met or not:
Option A:
[tex]6x + 20 <29\\6 (2) +20 <29\\12 + 20 <29\\32 <29[/tex]
It is not fulfilled!
Option B:
[tex]7x-10 <11\\7 (2) -10 <11\\14-10 <11\\4 <11[/tex]
Is fulfilled!
Option C:
[tex]14x + 10 <37\\14 (2) +10 <37\\28 + 10 <37\\38 <37[/tex]
It is not fulfilled!
Option D:
[tex]15x-18 <12\\15 (2) -18 <12\\30-18 <12\\12 <12[/tex]
It is not fulfilled!
So, option B is correct, inequality is met
ANswer:
Option B
Final answer:
Upon substituting x with 2 in each of the given inequalities, option B (7x − 10 < 11) is the only true inequality, making it the correct answer.
Explanation:
To determine which inequality is true for x = 2, let's substitute x with 2 in each option:
A) 6x + 20 < 29 becomes 12 + 20 < 29, which simplifies to 32 < 29. This is false.B) 7x − 10 < 11 becomes 14 − 10 < 11, which simplifies to 4 < 11. This is true.C) 14x + 10 < 37 becomes 28 + 10 < 37, which simplifies to 38 < 37. This is false.D) 15x − 18 < 12 becomes 30 − 18 < 12, which simplifies to 12 < 12. This is false since 12 is not less than 12.Therefore, option B) 7x − 10 < 11 is the true inequality when x = 2.
Use the product of powers property to simplify the numeric expression 41/3 • 41/5
Answers
Answer:
the answer is 4 8\15Two similar rectangular prisms have a scale factor of 3.4/5.1 .Find the ratio of their volumes.
Answers
[tex] \frac{3.4}{5.1} = 0.666667[/tex]
Your answer is 0.6 repeating
A bag has 2 blue marbles, 3 red marbles, and 5 white marbles. Which event have a probability greater than 1/5
Answers
Answer:
choosing 1 red marble
choosing 1 white marble, replacing it, and choosing another white marble
and choosing 1 white marble
A circle with radius of 2cm sits inside a circle with radius of 4cm What is the area of the shaded region
Answers
The area of the shaded region between a larger circle with a radius of 4 cm and a smaller circle with a radius of 2 cm is 12π cm². This is calculated by subtracting the area of the smaller circle from the area of the larger circle.
This concerns the area of the shaded area between two circles, one with a radius of two centimetres and the other with a radius of four centimeters.
In order to determine this, we first compute the area of each circle using the formula πr², where r is the circle's radius.
Let's start by calculating the area of the bigger circle: π(4cm)² = 16π cm² is the area.
In a similar manner, we can calculate the smaller circle's area: π(2cm)² = 4π cm² is the area.
The area of the shaded region is equal to the area of the larger circle minus the area of the smaller circle, or area = 16π cm² - 4π cm² = 12π cm².
How many different sleeve/size/color/artwork combination are possible
Answers
Answer:
128
Step-by-step explanation:
2*4*4*4= 128
Answer: Option D
( D) 128
Step-by-step explanation:
Find (2 × 10^7)+(3 × 10^4)
Answers
Answer:
20,030,000
Step-by-step explanation:
You find 10⁷ times 2. then 10⁴ times 3. then add them together
3x2-|y| When x=-5 and y =-2
Answers
I'm going to assume you're saying 3x to the power of 2. So first, apply the values of the variables to the equation just as shown:
3(-5)^2 - |-2|
So first, do -5 to the power of 2:
(-5)(-5)=25
Then, multiply 3 to 25:
3*25=75
Now, the absolute value of y is the absolute value of -2. The aboslute value of any number is its positive value, so now we are left with 75-2
75-2=73
73 is your answer.
Factor the expression 8x^3y-8x^2y-30xy
Answers
Find the Greatest Common Factor (GCF)
GCF = 2xy
Factor out the GCF. (Write the GCF first. Then, in parentheses, divide each term by the GCF.)
2xy(8x^3y/2xy + -8x^2y/2xy + -30xy/2xy)
Simplify each term in parenthesis
2xy(4x^2 - 4x - 15)
Split the second term in 4x^2 - 4x - 15 into two terms
2xy(4x^2 + 6x - 10x - 15)
Factor out common terms in the first two terms, then in the last two terms;
2xy(2x(2x + 3) -5(2x + 3))
Factor out the common term 2x + 3
= 2xy(2x + 3)(2x - 5)
Divide.3 1/2÷2 1/4 Enter your answer, as a mixed number in simplest form, in the box.
Answers
Answer: the exact form would be 14/9, decimal form would be 1.5 and the mixed number for would be 1 5/9
Step-by-step explanation:
Answer:
1 5/9
Step-by-step explanation:
3 1/2 divided by 2 1/4
convert to fractions; 7/2 divided by 9/4
invert the last fraction; 7/2 * 4/9
cross multiply; 7/1 * 2/9
multiply; 14/9
Convert to a mixed number; 1 5/9
Lawrence decided to test the balance of his favorite six-sided die. To do so, over the course of a month, he wrote down the total number of rolls he made with it at his weekly gaming night, and how many of those rolls showed a result of six. His data may be seen in the table below.
Week
1
2
3
4
Rolls Made
39
21
55
41
Results of Six
5
3
11
11
Find the experimental probability of Lawrence’s favorite die rolling a six, expressed as a percentage to two decimal places.
a.
16.67%
b.
18.49%
c.
19.23%
d.
26.83%
Please select the best answer from the choices provided
A
B
C
D
Answers
Answer:
C. 19.23%
Step-by-step explanation:
We simply have to sum up all the times he had a six then divide that by all the times he rolled the die.
Total times he got 6: 5 + 3 + 11 + 11 = 30
Total times he rolled the die: 39 + 21 + 55 + 41 = 156
The experimental probability is then 30 / 156 = 19.23%
It's a bit higher than expected (1/6 or 16.66%), but the sampling is relatively small. If he were to throw it a thousand times, he'd probably be much close to the theoretical probability.