A picture contains 17.5 cups of iced tea you drink 0.75 cups of the tea each morning and 1.75 cups of the tea each evening when will you run out of iced tea

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?