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3 years ago

You do parenthesis first right? And then do division?

Mathematics

2 answers:

Serhud [2]3 years ago

7 0

First you do parentheses then divide

IrinaK [193]3 years ago

4 0

Yes. Parenthesis first, then if any exponents, then multiplication or division, then addition and subtraction. PEMDAS.

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Select the words that mean the same as the Y-intercept. Select all that apply

d1i1m1o1n [39]

Answer:

i think its slope and initial value, so sorry if its wrong

Step-by-step explanation:

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2 years ago

What is the formula for finding the area of a regular polygon with perimeter P

klio [65]

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Option B

Coz perimeter is a capital 'P' and apothem length is small 'a'

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3 years ago

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KonstantinChe [14]

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3 years ago

What is the least number of degrees you could rotate a regular pentagon (5 equal side lengths) around its center so that it appe

Leya [2.2K]

Answer:

Well, I'm not the smartest person, nor do I exactly know what you mean, but I have a wild guess that the least you could rotate it is 100 degrees.

Step-by-step explanation:

Considering the fact that it's sides are all equal, you could compare this to a square, which also has equal sides. Its angles are equal, too, so you could measure it's angles (100 degrees) and turn it that exact amount,

I hope this helps you, like I said, I don't exactly know what you are talking about, I am not studying that sort of thing yet.

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3 years ago

Find the P-value for a test of the claim that more than 60% of the people following a particular diet will experience increased

lina2011 [118]

Answer:

The p-value of the test is 0.0207.

Step-by-step explanation:

Test of the claim that more than 60% of the people following a particular diet will experience increased energy (H1: p > 0.6).

The null hypothesis is:

$H_0: p = 0.6$

The alternate hypothesis is:

$H_1: p > 0.6$

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

0.6 is tested at the null hypothesis:

This means that $\mu = 0.6, \sigma = \sqrt{0.6*0.4}$

Of 100 randomly selected subjects who followed the diet, 70 noticed an increase in their energy level.

This means that $n = 100, X = \frac{70}{100} = 0.7$

Test statistic:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{0.7 - 0.6}{\frac{\\sqrt{0.6*0.4}}{\sqrt{100}}}$

$z = 2.04$

P-value of the test:

The p-value of the test is the probability of finding a sample proportion of at least 0.7, which is 1 subtracted by the p-value of z = 2.04.

Looking at the z-table, z = 2.04 has a p-value of 0.9793

1 - 0.9793 = 0.0207

The p-value of the test is 0.0207.

4 0

2 years ago