SOLUTION: It took Maria 9 hours to drive the 580 km between Devils Basin and Tumbleweed. The first part of the trip was through mountains and she averaged 60 km/h. Once out of the mountain

Question 1173680: It took Maria 9 hours to drive the 580 km between Devils Basin and Tumbleweed. The first part of
the trip was through mountains and she averaged 60 km/h. Once out of the mountains, she
averaged 70 km/h the rest of the way. How many hours did she spend driving through the
mountains?

Answer by josgarithmetic(39623) (Show Source): You can put this solution on YOUR website!
RATE*TIME=DISTANCE

              SPEED        TIME          DISTANCE

firstpart       60           x             60x

secondpart      70          9-x            70(9-x)

TOTAL                         9               580

Total distance gives the equation .
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