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2 years ago

11

Which expression is equivalent to the given expression?

1 answer:

jasenka [17]2 years ago

8 0

Answer:

C.) 2(x-3)(x-4)

Step-by-step explanation:

I think so

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What is the answer to: (1 1 5 ÷( 17 40 0.6−0.005))·1.7 5 6 1 1 3 −1 23 30 4.75 7 1 2 33÷4 5 7 ÷0.25?

ehidna [41]

This is crazy. If I'm reading this right (I'm not sure why there are spaces put in between some of those numbers like there is), I'm getting that the answer is
-1079.242293. But again, those spaces are throwing me off. I eliminated the spaces between the numbers while I was performing the operations in order.

3 0

3 years ago

Find an equation for the line that passes through the points (-4,-1) and (6,-5)

Sergio [31]

Answer:

y= -2/5x-13/5

Step-by-step explanation:

4 0

3 years ago

Use the information from the polling agency to determine the sample size needed to construct a 95% confidence interval with a ma

Ber [7]

Answer:

the sample size n= 771

sample proportion is p = 1/2

Step-by-step explanation:

<u>Step1:</u>-

marginal error formula is $\frac{2S.D}{\sqrt{n} }$

but if 'n' is sample size then $n = \frac{1}{(margin error)^{2} }$

Given margin error is 36% = 0.036

$n= \frac{1}{(0.036)^2}$

on simplification , we get n= 777 polling agencies

<u>Step 2</u>:-

$Margin of error = \frac{2\sqrt{p(1-p)} }{\sqrt{n} }$

substitute values , we get

$\frac{36}{100} = \frac{2\sqrt{p(1-p)} }{\sqrt{771} }$

after simplification, we get

$\sqrt{p(1-p)} = \frac{1}{2}$

squaring on both sides, we get

$p(1-p) = \frac{1}{4}$

multiply 'p' inside

$p-p^{2} =\frac{1}{4}$

cross multiplication '4' and simplify

$4p^{2} -4p +1 =0$ ........(1)

finding 'p' value

The equation (1) is of the form $(a-b)^{2} = a^{2} -2ab+b^{2}$

$(2p)^{2} -2(2p)(1)+1^{2} = (2p-1)^2$

$(2p-1)^2 =0$

$p=\frac{1}{2}$

<u>conclusion</u>:-

The sample size is 771

the sample proportion is p = $\frac{1}{2}$

4 0

3 years ago

Anusha needs to find a rectangular container large enough to hold a volume of 130 in.. Which container should sh

Alinara [238K]

Answer:

"a container with the dimensions 3 by 5 by 10 inches"

Step-by-step explanation:

To find volume of rectangular box, we multiply the length, width, and height. Or if given in 3 dimensions form, we multiply all 3.

Lets find volume of each of the answer choices:

a container with the dimensions 2 by 5 by 10 inches = 2 * 5 * 10 = 100

a container with the dimensions 3 by 4 by 10 inches = 3 * 4 * 10 = 120

a container with the dimensions 3 by 5 by 10 inches = 3 * 5 * 10 = 150

a container with the dimensions 4 by 2 by 10 inches = 4 * 2 * 10 = 80

We want a container LARGE ENOUGH to contain a volume of 130 cubic inches. Which of the containers has a volume GREATER than 130?

Yes, only the 3rd option. It is 150 cubic inches in volume.

So, this is the answer:

a container with the dimensions 3 by 5 by 10 inches

4 0

3 years ago

Use the elimination method to solve the system of equations.

-Dominant- [34]

A. (5, -3) is the answer

6 0

3 years ago