2 years ago

1. Is 5(x+1) the same as 5x+1? Explain your

Mathematics

1 answer:

tatiyna2 years ago

5 0

Answer:

Step-by-step explanation:

5(x+1), when expanded, becomes 5x + 5, which is ot the same as 5x + 1.

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Which distribution is positively skewed?

hram777 [196]

it is a right skew.........

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2 years ago

A rectangle's length, x, is 2 meters greater than its width. If the perimeter of the rectangle is greater than 112 meters, what

Harman [31]

Answer:

The possible length is greater than 29 meters.

Step-by-step explanation:

If the length is x then the width is x - 2 m.

So the perimeter is 2x + 2(x - 2) = 4x - 4 m.

4x - 4 > 112

4x > 116

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2 years ago

When obtaining a confidence interval for a population mean in the case of a finite population of size N and a sample size n whic

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Answer:

95% Confidence interval for the mean

$142.8 \leq\mu\leq158.4$

Step-by-step explanation:

We have to calculate a 95% confidence interval for the mean of a finite population.

The error is multiplied by the following finite population correction factor:

$cf=\sqrt{\frac{N-n}{N-1} }$

The standard deviation can be estimated as

$\sigma=\frac{s}{\sqrt{n}} \sqrt{\frac{N-n}{N-1} } =\frac{24.4}{\sqrt{32} }* \sqrt{\frac{200-32}{200-1} }=3.963$

The 95% confidence interval has a z value of 1.96, so it becomes:

$M-z*\sigma_c\leq\mu\leq M+z*\sigma_c\\\\150.6-1.96*3.963\leq\mu\leq 150.6+1.96*3.963\\\\ 142.8 \leq\mu\leq 158.4$

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3 years ago

It takes Jill 2 hours to run 14.5 miles. At this rate, how far could she run in 3 hours?

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Answer:

Step-by-step explanation:

So we can just set up a proportion

14.5/2=x/3

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so that means

2x=43.5

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Answer:

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