For f(x)=3x+1 and g(x)=x^2-7 fins (f o g)(x)

Astudent received the following grades last semester. find the student's semester grade point average. an a is algebra (3 credits), a b in history ( 3 credits), a in sociology ( 3 credits) a d in english ( 3credits) and a c in seminar ( 2credits). an a is worth 4 points, a b is worth 3 points a c is worth 2 points and a d is worth 1 point.

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

Ineed i been stuck on this question since yesterday