The height, h m, of a golf ball at time, t s , from the ground is given by
h = -5t- + 15t.
(a) Draw the graph of h = -5t- + 15t for
0 (b) Find the maximum height of the golf ball
from the ground.
(c) Find the time of flight of the golf ball.
(d) When is the golf ball 8 m above the
ground?

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?