A store buys bicycles for $60 then marks up the price by 40% to sell them. Currently, the store is having a sale on bicycles for 25% off the normal price. What is the sale price of the bicycles?

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?