Ashley is on her way home in her car. she has driven 21 miles so far, which is one-third of the way home. what is the total length of her drive?

So if 21 miles is 1/3 of the way you want to multiply 21 by 3 to get 3/3 or the whole way.

21*3=63

The total length of her trip was 63 miles.

If 21 miles is 1/3 the distance home, she must drive 3x the distance to get home. 

21x3=63 miles

The total length of her drive is 63 miles.

Another method is to write an equation, with d being the total distance:
21=1/3d
(3)21=1/3d(3)
63 miles=d

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.

The answer to the question is d