the stopping distance d in feet for a car traveling at x miles per hour on wet level pavement can be estimated by
x. if a driver can see only 300 feet ahead on a curve, find a safe speed limit.

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?