(2-y)/(y+7)=3/5 what is the answer

1 answer:

3 0

Multiplying both sides by y+7, we get 2-y=(3y+21)/5 and then by multiplying both sides by 5 we get 10-5y=3y+21. After that, subtract 21 from both sides as well as add 5y to both sides to get -11=8y, so divide by 8 to get -11/8=y

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Let g represent the mean mark for the 10 girls in the class. Then the mean mark for the class was ...

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The answer to your question is below

Step-by-step explanation:

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