Question

Sylvie is going on vacation. She has already driven 60 miles in one hour. Her average speed for the rest of the trip is 57 miles per hour. How far will Sylvie have driven 7 hours later? Show you work.

Answer 1

well you do 57 time 7 and get 399 and then it says how far will she have driven so you would add the 60 and get 459 miles. 

Answer 2

399.0 additional miles
57*7=339.0

399.0 total miles
 339
+ 60
399