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Lina20 [59]
3 years ago
13

kinsley walked 7/8 mile on saturday and 6/8 on sunday how far did she walk over the weekend give the answer as a mix number

Mathematics
1 answer:
jenyasd209 [6]3 years ago
7 0
She walked 14/8 miles on saturday and sunday
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Graph the system of linear equations.<br> y = x + 5 and y = 2x + 2.
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Graph using y=mx+b. The point of intersection is (3,8)

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3 years ago
If y is proportional to x and y = -15 when x = -20, what is the value of x when y = 12?
alexandr402 [8]
Maybe i have that you wanted We can represent the situation like that: Y=-15 and x=-20 Then When y=12 x=? We make x(The unknown) *-15=12*(-20) We have an simple équation to solve Thus x=(12*(-20))/-15 X=16
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3 years ago
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g A random sample of 100 students was taken. Eighty-five of the student in the sample experienced anxiety during the exam. We ar
BaLLatris [955]

Answer:

The test statistic is z = 1.25

Step-by-step explanation:

We are interested in determining whether or not the proportion of the student who experience anxiety during the exam is significantly more than 80%.

At the null hypothesis, we test if the proportion is 80%, that is:

H_0: p = 0.8

At the alternate hypothesis, we test if the proportion is more than 80%, that is:

H_a: p > 0.8

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.

80% is tested at the null hypothesis:

This means that \mu = 0.8, \sigma = \sqrt{0.2*0.8} = 0.4

A random sample of 100 students was taken. Eighty-five of the student in the sample experienced anxiety during the exam.

This means that n = 100, X = \frac{85}{100} = 0.85

The test statistic is

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

z = \frac{0.85 - 0.8}{\frac{0.4}{\sqrt{10}}}

z = 1.25

The test statistic is z = 1.25

4 0
3 years ago
Eunice buys dog bed with a listed price of $31. Eunice uses a sale that provides 30% off. What is the total
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Answer:

21.70

Step-by-step explanation:

First find the discount

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31 *.30

9.3

Subtract from the original amount

31 - 9.3

21.70

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3 years ago
3 1/4 - 1 3/8 (please help)
viva [34]

In fix fraction it will be, 1 7/8

and the exact answer is 15/8

and in decimal from it will be, 1.875

3 0
3 years ago
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