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3 years ago

Help me pls pls pls

Mathematics

1 answer:

Simora [160]3 years ago

4 0

Answer:

A.the product of X and a factor not depending on X.

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How can i rewrite the expression using distributive property and simplify?<br> (6v^2+v-3)4

kiruha [24]

$({6x}^{2} + x - 3)4$
you distribute 4 into the ( )
${24x}^{2} + 4x - 12$

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2 years ago

6. Which of the following inequalities is true? (1 point)

aleksley [76]

Answer:

15/2 < √81

15/2=7.5

√81=9

7.5<9

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2 years ago

What is the slope of a line that is perpendicular to the line of 2x+4y=12

kipiarov [429]

make the equation slope-intercept form:

subtract 2x from both sides:

4y = -2x + 12

divide by 4 to get y by itself:

y = -1/2x + 3

to make the new line perpendicular to the existing line, completely flip the slope of the line:

y = 2x + 3

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2 years ago

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estim

prohojiy [21]

Using the z-distribution, it is found that a sample size of 3,385 is required.

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

A confidence interval of proportions is given by:

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

The margin of error is:

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

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

In this problem, we have a 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.

We have no prior estimate, hence $\pi = 0.5$ is used, which is when the largest sample size is needed. To find the sample size, we solve the margin of error expression for n when M = 0.02, hence: