Kitty practiced the flute for 45 minutes. then she ate a snack for 15 minutes. then she watched television for 30 minutes until 6: 00 p. m. at what time did katie start practicing the flute

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?