If 7 gallons of paint are used to paint 4 classrooms at Cascade Middle School, then how many gallons of paint would be needed to pain 16
classrooms? Please enter the number value only in the blank.
gallons

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?