Which expression would be easier to simplify if you used the commutative property to change the order of the numbers?
O A. +(-) +5
O B. (-17) + 45+ (-33)
O C. 20+80+ (-32)
O D. 20+17+(-) + (-)
Will mark branliest if correct

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.

What is the missing step in this proof ?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10