You are bidding on a job to maintain the local soccer fields in a community park. There are 8 fields that need to have their grass mowed weekly. The fields are 80 yards by 120 yards. The riding lawn mower you have has a 2.5 feet cutting width and an average of 3.5 miles per hour speed with regular use.

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?