How to distributive property to rewrite each expression?

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

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.

Rounded to the nearest tenth, what is the value of x