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3 years ago

Find m Just trying to get my credit

Mathematics

2 answers:

kogti [31]3 years ago

8 0

Answer:

130

Step-by-step explanation:

2x+5x+5=180

7x+5=180

7x=175

x=25

5(25)+5=125+5=130

nalin [4]3 years ago

5 0

Answer:

∠ABC=130

Step-by-step explanation:

2x+5x+5=180

7x=180-5

7x=175

x=25

∠ABC=5*25+5=130

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Sarah rolls 2 fair dice and adds the results from each.

notka56 [123]

Answer:

1/36 ≈ 0.028

Step-by-step explanation:

In order to get a total of 2 if you roll 2 dice, you have to roll two ones. (You can't roll a 0 and 2 because an average die does not have a zero on it)

You have a 1/6 chance to roll a 1 on the first die; and you have a 1/6 chance to roll a one on the second die.

To find the probability of this happening together you have to multiply them together.

1/6 * 1/6 = 1/36 = 0.0277778 ≈ 0.028

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4 years ago

The figure shows a pair of parallel line segmants on a coordinant grid. the line segments are translated 2 units to the left to

Nitella [24]

It is D because the segments don’t intersect and are just moving 2 units to the left. They are the same distance apart.

Hope it helps and is correct :)

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3 years ago

Read 2 more answers

We would like to create a confidence interval.

Vlada [557]

Answer:

c.A 90% confidence level and a sample size of 300 subjects.

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 $1-\alpha$ , we have the confidence interval with a margin of error of:

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

In which

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

In this problem

The proportions are the same for all the options, so we are going to write our margins of error as functions of $\sqrt{\pi(1-\pi)}$

a.A 99% confidence level and a sample size of 50 subjects.

$n = 50$

99% confidence interval

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

The margin of error is

$M = z\sqrt{\frac{\pi(1-\pi)}{n}} = \frac{2.575}{\sqrt{50}}\sqrt{\pi(1-\pi)} = 0.3642\sqrt{\pi(1-\pi)}$

b.A 90% confidence level and a sample size of 50 subjects.

$n = 50$

90% confidence interval

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The margin of error is

$M = z\sqrt{\frac{\pi(1-\pi)}{n}} = \frac{1.645}{\sqrt{50}}\sqrt{\pi(1-\pi)} = 0.2623\sqrt{\pi(1-\pi)}$

c.A 90% confidence level and a sample size of 300 subjects.

$n = 300$

90% confidence interval

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The margin of error is

$M = z\sqrt{\frac{\pi(1-\pi)}{n}} = \frac{1.645}{\sqrt{300}}\sqrt{\pi(1-\pi)} = 0.0950\sqrt{\pi(1-\pi)}$

This produces smallest margin of error.

d.A 99% confidence level and a sample size of 300 subjects.

$n = 300$

99% confidence interval

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

The margin of error is

$M = z\sqrt{\frac{\pi(1-\pi)}{n}} = \frac{2.575}{\sqrt{300}}\sqrt{\pi(1-\pi)} = 0.1487\sqrt{\pi(1-\pi)}$

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4 years ago

Write the equation of the line that passes through the points (-3, - 5) and (-9,3). Express your answer in

Leokris [45]

that's the answer

Step-by-step explanation:

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3 years ago

The formula for the area of a triangle is A= bh, where b is the base of the triangle and h is the height of the triangle. What i

vazorg [7]

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3 years ago