At least 40 pounds of fertilizer is needed to adequately cover your backyard. let f = the amount of fertilizer needed.

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.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b