Solve the linear system by substitution. Worth 30 points!

Mathematics

2 answers:

Anastaziya [24]3 years ago

8 0

2(2y) +6y=15

10y=15
Y= 1.5

Tatiana [17]3 years ago

7 0

(x, y) = (3, 3/2)

Hope that I helped. :)

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Which of the following sets of angles sum to 180°?<br> picture included, please help.

eduard

Answer:

Choice 3

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3 years ago

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Construct a 99% confidence interval to estimate the population proportion with a sample proportion equal to 0.36 and a sample s

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Using the z-distribution, the 99% confidence interval to estimate the population proportion is: (0.2364, 0.4836).

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

In this problem, we have a 99% confidence level, hence $\alpha = 0.99$ , z is the value of Z that has a p-value of $\frac{1+0.99}{2} = 0.995$ , so the critical value is z = 2.575.