If “d = rt” then “t = [?] / [?].” Substitute the correct variable for the question mark in the numerator and denominator. Select one:

a. r/d

b. d/r

c. t/d

d. .t/r

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.