Which one of the following examples represents a proper fraction?
a. 12/9
b. 15/22
c. 3/2
d. 8/8

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.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

State one method by which you can recognize a perfect square trinomial.