14 ft = how many yards with a remainder of feet

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.

X2 + y 2 = 36 x + y = 6 solve the system of equations.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?