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4 years ago

In algebra 1 how do I solve for y in this problem? -3x=y+2

Mathematics

1 answer:

Alenkinab [10]4 years ago

5 0

Y=<span><span>−<span>3x</span></span>−<span>2
</span></span>-3x=y+2 (keep, change, flip)
so....
-3x-2 :) Hope I helped!

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3 years ago

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Using the z-distribution, a sample size of 180 is needed for the estimate.

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

$\overline{x} \pm z\frac{\sigma}{\sqrt{n}}$

The margin of error is given by:

$M = z\frac{\sigma}{\sqrt{n}}$

In which:

$\overline{x}$ is the sample mean.

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$\sigma$ is the standard deviation for the population.

In this problem, we have a 98% confidence level, hence $\alpha = 0.98$ , z is the value of Z that has a p-value of $\frac{1+0.98}{2} = 0.99$ , so the critical value is z = 2.327.

The population standard deviation is of $\sigma = 23$ , and to find the sample size, we have to solve for n when M = 4.

Hence:

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$4 = 2.327\frac{23}{\sqrt{n}}$

$4\sqrt{n} = 2.327 \times 23$

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More can be learned about the z-distribution at brainly.com/question/25890103

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2 years ago

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Every day? did you not type the full question??

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3 years ago

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3 years ago

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