Marie is a waitress. she earns an hourly wage plus tips. over the course of three days, she earned a total of $190 and at an average of $10 per hour. if marie worked 4 hours on monday and twice as many hours on tuesday, how many hours, x, did she work on wednesday?

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.