Ben says 7 9/100 must be less than 7 2/10 because 9 hundredths is less than 2 tenths. do you agree? draw a number line to show how you know

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?