Machine a produces 75 fishing lures per minute. machine b produces 50 of the same lure per minute. how long will it take both machines running to produce 2100 fishing lures? a.14.4 minutes b.16.8 minutes c.18.2 minutes d.20.7 minutes

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?