Please help I’ll mark you as brainliest if correct

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

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

How many $20 bills do you need to have to make $280