Mrs. pine took tennis lessons. she traveled 15 miles one way at an average cost of $0.45 per mile. her racket cost $84, balls cost 15.50, shoes cost $47.00, her warm-up was $32, and her shorts were on sale for $22. she paid 5% sales tax on her equipment and $25.00 per lesson for 10 lessons. including the cost of round-trip travel for all 10 lessons, what did this cost?

Three students, javier, sam, and corrine, participated in a fundraiser where people donated a certain amount of money per lap that the student ran. each student also had some initial donations that were collected before the run. the equations that represent each student's total donation, y, based on the number of laps ran, x, is shown below. match each equation with the correct rate of change for that student.