Reduce to simplest form 11/12 - -2/3

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

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.

For each proportion find the unknown number x 1/5/8=×/15