Find the value of two numbers is their sum is 12 and there difference is 4

49xy +34y - 72z. determine the degree of the polynomial

What is the area of triangle abc if a = 8, b = 11, and c = 15?

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.