In math cuz my teacher is strict it HAS to be done today soo I need help

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

The ratio of rock songs to dance songs on jonathan’s mp3 player is 5: 6. the total number of rock and dance songs jonathan has is between 101 120. how many rock songs does he have?

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left