Question

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?i

Answer 1

can lisa earn more than mary

Answer 2

or 120 more or 65 more?

Answer 3

Does the question happen to tell you what the base amount is?

Answer 4

no

Answer 5

im trying to use slope eqution but I got 2 answers

Answer 6

Ok. So just by guessing and checking, I found that the base amount appears to be 30. Then, Mary gets 4 dollars a student. So this means at 20 students, Mary receives 30 + 4 times the number of students. This shows Mary getting a total of 110. Now, If Lisa gets double the amount per student but half of the base amount, you can add 15 + 8 times the number of students (20). This comes out to 175. This shows that Lisa gets 65 dollars more than Mary does.

Answer 7

awesome that's what I got the 1st time but just wasn't sure