Which is a sum of cubes?

a3 + 18
a6 + 9
a9 + 16
a12 + 8

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.

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

How can (square root of 25) ^2 be rewritten?