Can somebody help please :)

Mathematics

2 answers:

Reptile [31]3 years ago

6 0

Answer:

the answer would be b

Step-by-step explanation:

You need to get the x alone, so you have to subtract 10 from both sides. The step after that would be to divide 2 from both sides.

Hope this helps! :)

kvv77 [185]3 years ago

3 0

Answer: 2x = -25.

Reason: Since this is an equation, you need to get x by itself. (Unless Slope Intercept form) So, you subtract 10, and add it to the other side, and you get 2x = -25. I hope this helps, and stay safe! :)

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Ilia_Sergeevich [38]

Using the z-distribution, a sample of 142,282 should be taken, which is not practical as it is too large of a sample.

<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:

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

In which:

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

z is the critical value.

n is the sample size.

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

Assuming an uniform distribution, the standard deviation is given by:

$S = \sqrt{\frac{(4 - 0)^2}{12}} = 1.1547$

In this problem, we have a 95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so the critical value is z = 1.96.