The number of cents in q quarters is 150

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it. how many multiple-choice questions are on the test?

Me because some of question i don’t understand