The weight of an object on the moon is 1/6 of its weight on earth if I Moonrock weighs 20 12 pounds on earth how much did the Moonrock weigh on the moon

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

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 are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2