What is the value of x in equation of x/3=12?

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =