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V125BC [204]
3 years ago
13

How do you simplify 2a^2b^2(7ab)

Mathematics
1 answer:
Charra [1.4K]3 years ago
8 0
To simplify you simply find common variables and add them together to get 56a^3b^3
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A triangular pyramid has 3 rectangular sides and a top and bottom triangular base.
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How do I solve what is 2/3 of 90
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<span>The answer is 60.

Explanation<span>:
In mathematics, the word "of" indicates multiply. This means we would multiply 2/3 * 90.

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What is 271,403 rounded to the nearest thousand?
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271,403 = 271,400 is the answer

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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
The dot plot shows the favorite sport to play according to some middle school students chosen at random. Which statement is true
MrMuchimi

What are the options?

6 0
3 years ago
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