2 years ago

GIVING BRAINLIEST, NO LINKS, LOOK AT THE PICTURE

Mathematics

1 answer:

Margarita [4]2 years ago

4 0

Answer: 2 2/5

Step-by-step explanation:

hope that helped :)))

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; the boy to girl ratio is 10 to 8. If there are 16 girls in the class, how many boys are there?

Zigmanuir [339]

Answer:

There are 20 boys

Step-by-step explanation:

4 0

3 years ago

Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.5 parts

Hunter-Best [27]

Answer:

The value of the test statistic is $t = 2.1$

Step-by-step explanation:

Our test statistic is:

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

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

The level of ozone normally found is 7.5 parts/million (ppm).

This means that $\mu = 7.5$

The mean of 24 samples is 7.8 ppm with a standard deviation of 0.7.

This means that $X = 7.8, \sigma = 0.7, n = 24$

Test Statistic:

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

$t = \frac{7.8 - 7.5}{\frac{0.7}{\sqrt{24}}}$

$t = 2.1$

The value of the test statistic is $t = 2.1$

7 0

3 years ago

shepuryov [24]

Answer:

12x + yx

= 12x + xy

= ans = xylem + 12x

7 0

3 years ago

I need helpp please

IrinaK [193]

Answer:

Total is $138.75 which is answer D

Step-by-step explanation:

15*3.5= $52.50

15*5.75= $86.25

Total is $138.75

3 0

3 years ago

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Solve -Q=1/2p+15,for p

alukav5142 [94]

P=-2Q-30 is the answer

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3 years ago

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