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

Algebra ->  Customizable Word Problem Solvers  -> Travel -> 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      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

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(39621) About Me  (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 60x%2B70%289-x%29=580.
.
.