SOLUTION: two cars leave a parking lot and travel in opposite directions. one travels at 9 miles per hour and the other travels at 5 miles per hour. in how many hours will the two cars be 42

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Question 186408: two cars leave a parking lot and travel in opposite directions. one travels at 9 miles per hour and the other travels at 5 miles per hour. in how many hours will the two cars be 42 miles apart?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
RT=D
9T+5T=42
14T=42
T=42/14
T=3 HOURS ANS.