The local skating rink pays Mary a fixed rate per pupil plus a base amount to work as a skating instructor. She earns $90 for
instructing 15 students on Monday afternoon Last Friday, she earned $62 for working with 8 students. Lisa is also a skating
Instructor. She receives half the base amount that Mary does, but she is paid twice as much per student. Who would earn
more money instructing a class of 20 students?
Who earns more money ?
