How do you solve -4x>20

If m 17 27 90 63 ** picture is attached

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?