I’m not sure how to do this and I need help

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

For which pair of functions is (gof)(a)=|a|-2?

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.