SOLUTION: Mary and Janet are running in the Apple hill fun run. Mary runs at 7 mph, Janet at 5mph. If they start at the same time, how long will it be before they are 1.5 miles apart .

Question 995512: Mary and Janet are running in the Apple hill fun run. Mary runs at 7 mph, Janet at 5mph. If they start at the same time, how long will it be before they are 1.5 miles apart .
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the distance in miles
Mary travels in time in hrs
= the distance in miles
Janet travels in time in hrs
-----------------------------
Mary's equation:
(1)
Janet's equation:
(2)
------------------
Substitute (1) into (2)
(2)
(2)
(2)
and

In 45 min they will be 1.5 mi apart
-------------
check:
(1)
(1)
(1)
and
(2)
(2)
(2)
(2)
OK
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