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3 years ago

Brainliest will be given if answered under 30min.

Mathematics

2 answers:

vredina [299]3 years ago

5 0

The mean is 7,2
The mean is 0,6

uranmaximum [27]3 years ago

3 0

Answer:

1. The mean is 7,2

2. The mean is 0,6

Explanation: The mean of a set of numbers is the sum divided by the number of terms.

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In math class, 4 students complete individual surveys to determine the percentage of high school teachers that have a second job

dlinn [17]

Answer:

Option D) B and C

Step-by-step explanation:

we know that

To find out the percentage of high school teachers that have a second job, divide the number of teachers that have a second job by the total number of teachers

Survey A

$\frac{28}{110}=0.2545$

Convert to percentage

$0.2545(100)=25.45\%$

Survey B

$\frac{27}{90}=0.3$

Convert to percentage

$0.3(100)=30\%$

Survey C

$\frac{21}{70}=0.3$

Convert to percentage

$0.3(100)=30\%$

Survey D

$\frac{32}{80}=0.4$

Convert to percentage

$0.4(100)=40\%$

Compare the percentages

Surveys B and C have the same percentage

therefore

Surveys B and C show proportional results, because the ratio of the number of teachers that have a second job by the total number of teachers is equal (this number is the constant of proportionality k in a proportional relationship between two variables)

8 0

3 years ago

Find the difference. (-9ab-a+9) - (-ab+1)

scoray [572]

Answer:

-8ab + a + 8

Step-by-step explanation:

i simplified

is tht ok

6 0

3 years ago

Read 2 more answers