Can you guys help me with this? (The picture is below)

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

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges

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?