What is the product of 3sqrt12 and 6sqrt8?

Answer this question only if you know the answer! 30 points and

Which expression is equivalent to 2x^2+7x+4?

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.