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3 years ago

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Which graph represents y=square root of x

1 answer:

Arada [10]3 years ago

3 0

Answer: b on edge 2020

Step-by-step explanation:

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Write the expression in factored form: m²-n²

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This expression is a difference of squares: $x^2 - y^2 = (x + y)(x - y)$

$m^2 - n^2 = (m + n)(m - n)$

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A company pays 75 percent of each employees medical care premium. If the employee portion is $50 per month and there are 100 emp

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500 dollars for each employee

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What is 6.15 expressed as a fraction?

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Which number(s) below belong to the solution set of the equation? Check all

Brilliant_brown [7]

Answer:

<h2>only x = 39</h2>

Step-by-step explanation:

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4 years ago

There are 9,481 eligible voters in a precinct. 500 were selected at random and asked to indicate whether they planned to vote fo

maria [59]

Answer:

The confidence limits for the proportion that plan to vote for the Democratic incumbent are 0.725 and 0.775.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

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

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

Of the 500 surveyed, 350 said they were going to vote for the Democratic incumbent.

This means that $n = 500, \pi = \frac{350}{500} = 0.75$

80% confidence level

So $\alpha = 0.2$ , z is the value of Z that has a pvalue of $1 - \frac{0.2}{2} = 0.9$ , so $Z = 1.28$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.75 - 1.28\sqrt{\frac{0.75*0.25}{500}} = 0.725$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.75 + 1.28\sqrt{\frac{0.75*0.25}{500}} = 0.775$

The confidence limits for the proportion that plan to vote for the Democratic incumbent are 0.725 and 0.775.

8 0

3 years ago