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3 years ago

This is a lot but please help me I’ll mark u as brilliant

Mathematics

1 answer:

givi [52]3 years ago

7 0

Answer:

see below

Step-by-step explanation:

# of sides = 3

# of vertices = 3

name of shape: triangle

# of sides = 4

# of vertices = 4

name of shape: quadrilateral

# of sides = 5

# of vertices = 5

name of shape: pentagon

# of sides = 6

# of vertices = 6

name of shape: hexagon

# of sides = 8

# of vertices = 8

name of shape: octagon

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Plz help I will give brainliest

arsen [322]

Answer:

#8. M = -8/9

#9. M = 3/5

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2 years ago

Please help.....no one would help me so PLZZZZ

Anvisha [2.4K]

Answer:

Step-by-step explanation:

a) r = 10/2 = 5 feet

Area of floor =πr² =3.14*5*5 = 78.5 feet²

B) h = 3 foot

Volume of cylinder = πr²h = 3.14*5*5*3 = 235.5 cubic feet

Volume of hemisphere =2/3πr³= 2*3.14*5*5*5/3=261.67 cubic feet

Volume of space inside the observatory = 497.17 cubic feet

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3 years ago

1/4 × -2/3 = how do I solve this problem

Katyanochek1 [597]

$\bf \cfrac{1}{4}\times \cfrac{-2}{3}\implies \cfrac{1\times -2}{4\times 3}\implies \cfrac{-2}{12}\implies \stackrel{simplified}{-\cfrac{1}{6}}$

6 0

3 years ago

Read 2 more answers

How do you do this ?

Maru [420]

Well the first part is 27 but the second part is adding 60 to 21 which is 81. dont forget that!

4 0

3 years ago

Read 2 more answers

A United Nations report shows the mean family income for Mexican migrants to the United States is $27,000 per year. A FLOC (Farm

disa [49]

Answer:

We conclude that the mean family income for Mexican migrants to the United States is $27,000 per year and the provided information is consistent with the United Nations report.

Step-by-step explanation:

We are given that a United Nations report shows the mean family income for Mexican migrants to the United States is $27,000 per year.

A FLOC evaluation of 25 Mexican family units reveals a mean to be $30,000 with a sample standard deviation of $10,000.

Let $\mu$ = true mean family income for Mexican migrants.

So, Null Hypothesis, $H_0$ : $\mu$ = $27,000 {means that the mean family income for Mexican migrants to the United States is $27,000 per year}

Alternate Hypothesis, $H_A$ : $\mu$ $\neq$ $27,000 {means that the mean family income for Mexican migrants to the United States is different from $27,000 per year}

The test statistics that would be used here One-sample t test statistics as we don't know about the population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample mean family income = $30,000

s = sample standard deviation = $10,000

n = sample of Mexican family = 25

So, the test statistics = $\frac{30,000-27,000}{\frac{10,000}{\sqrt{25} } }$ ~ $t_2_4$

= 1.50

The value of t test statistics is 1.50.

Since, in the question we are not given the level of significance so we assume it to be 5%. Now, at 5% significance level the t table gives critical values of -2.064 and 2.064 at 24 degree of freedom for two-tailed test.

Since our test statistic lies within the range of critical values of t, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which we fail to reject our null hypothesis.

Therefore, we conclude that the mean family income for Mexican migrants to the United States is $27,000 per year and the provided information is consistent with the United Nations report.

4 0

3 years ago