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4 years ago

1) X2- X - 42 What is the answer

Mathematics

1 answer:

ElenaW [278]4 years ago

3 0

Answer:

the answer is equal to x-42

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Let f(x)=x^2+5x−8. What is the average rate of change from x = 2 to x = 6?

Savatey [412]

And that is how you get your answer

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4 years ago

Please answer this correctly

Mila [183]

Answer:

50%

Step-by-step explanation:

not even = 2 nums

pnoteven = 2 ÷ 4 × 100

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3 years ago

Read 2 more answers

Find the measure of x.

nikitadnepr [17]

Answer:

x = 5.6

Step-by-step explanation:

Using trigonometric ratios.

$tan 34 = \frac{opposite}{adjacent}$

$0.6745 = \frac{x}{8.3}\\\\x = 8.3 \times 0.6745\\\\x = 5.6$

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4 years ago

) Beth wants to determine a 99 percent confidence interval for the true proportion p of high school students in the area who att

Lunna [17]

Answer:

n has to be at least 16577.

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 $1 - \frac{\alpha}{2}$ .

The margin of error is:

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

Out of n randomly selected students she finds that that exactly half attend their home basketball games.

This means that $\pi = 0.5$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

About how large would n have to be to get a margin of error less than 0.01 for p

We have to find n for which M = 0.01. So

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

$0.01 = 2.575\sqrt{\frac{0.5*0.5}{n}}$

$0.01\sqrt{n} = 2.575*0.5$

$\sqrt{n} = \frac{2.575*0.5}{0.01}$

$(\sqrt{n})^2 = (\frac{2.575*0.5}{0.01})^2$

$n = 16576.6$

Rounding up

n has to be at least 16577.

6 0

3 years ago

A line passes through (9, –9) and (10, –5).Write an equation for the line in point-slope form.

CaHeK987 [17]

Y - y1 = [-9-(-5)]/[(9-10] * (x - x1)

y - (-9) = [-9 + 5] / [-1] * (x - 9)

y + 9 = (-4) / (-1) * (x - 9)

y + 9 = 4(x - 9)

y + 9 = 4x - 36

y = 4x - 36 - 9

y = 4x - 45 This is the slope - intercept form.

y - 4x + 45 = 0 This is the standard form

5 0

3 years ago