Let f(x) = 3x^5/3 and g(x) = -2x^5/3. Find (f + g)(x) and (f - g)(x)
and state the domain of each. Then evaluate (f + g)(-8) and (f - g)(-8).

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?