SOLUTION: Two friends left school at the same time and drove in opposite directions. One friend averages 40 miles per hour and the other friend averages 35 miles per hour. When will they be

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Question 598671: Two friends left school at the same time and drove in opposite directions. One friend averages 40 miles per hour and the other friend averages 35 miles per hour. When will they be 150 miles apart?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
They are moving apart at the rate of +40+%2B+35+=+75+ mi/hr
Let +t+ = time for them to be +150+ mi apart
+150+=+r%2At+
+150+=+75t+
+t+=+150%2F75+
+t+=+2+
They will be 150 mi apart in 2 hrs