SOLUTION: Adrianna and Krystal both leave the library at the same time, but in opposite directions. If Krystal travels 8 mph faster than Adrianna and after 7 hours they are 252 miles apart,

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Question 1185397: Adrianna and Krystal both leave the library at the same time, but in opposite directions. If Krystal travels 8 mph faster than Adrianna and after 7 hours they are 252 miles apart, how fast is each traveling?
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


Since Krystal's speed is 8mph faster than Adrianna's...

x = Adrianna's speed
x+8 = Krystal's speed

The sum of the distances Adrianna and Krystal travel in 7 hours is 252 miles:

7%28x%29%2B7%28x%2B8%29=252
7x%2B7x%2B56=252
14x=196
x=196%2F14+=+14

ANSWERS:
Adrianna's speed: x=14mph
Krystal's speed: x+8=22mph