SOLUTION: Daniel left the science museum and traveled toward the lake Aran average speed of 35 mph. Mary left four house later and traveled in the opposite direction with an average speed of

Question 1067763: Daniel left the science museum and traveled toward the lake Aran average speed of 35 mph. Mary left four house later and traveled in the opposite direction with an average speed of 35 mph. Find the number of hours Mary needs to travel before they are 210 mi. apart
Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
35x + 35(x-4) = 210
35x + 35x-140 = 210
70x = 350
x = 5 hours. This is Daniel.
Mary leftt 4 hours later:
5-4 = 1 Mary drove for 1 hour
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Check:
5 x 35 = 175
1 x 35 = 35
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Total . :210 Correct
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