John paid $5.88 in sales tax on his total bill of $84.00 before tax. At that rate, how much would he pay in sales tax on a bill that costs $116.00 before tax?

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?