A lawn company advertises that they can spread 7,500 square feet of grass seed in 2 and 1/2 hours. Find the number of square feet of grass seed that can be spread per hour.

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?