Respuesta :

AcelaaTrack
Answer: 21.13 miles

Explanation: The question asks “drive in all”. They gave you the miles driven, which is 8.7 and 12.43. If you add them together, you will get 21.13 miles.
beinggreat78

Answer:

8.7 + 12.43 = 21.13

Why did we add?

"In all" indicates addition, therefore giving us 2 values to add together, and that is why we added the two given values.