16- X = -12 + 3x help :(

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. 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.

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Which graph represents the function g(x) = |x + 4| + 2?