Please solve and leave explanation. (Will mark brainliest)

What are “like terms”? why can we only add like terms?

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.

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?