Which expression helps you find the length x of a side of a rectangle that has a diagonal of 15 units and a width of 9 units?
CLEAR CHECK

x2 = 152 – 92

x2 = (15 + 9)2

x2 = 152 + 92

x2 = (15 – 9)2

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.