SOLUTION: you drive 1500 miles to California. On the way home, you averaged 10 miles per hour less, and the drive took you 5 extra hours. What was your average speed on the way to California
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Question 210036: you drive 1500 miles to California. On the way home, you averaged 10 miles per hour less, and the drive took you 5 extra hours. What was your average speed on the way to California? Found 2 solutions by nyc_function, josmiceli:Answer by nyc_function(2741) (Show Source):
You can put this solution on YOUR website! Write 2 sets of equations, 1 going and 1 coming back
To California:
And back
given: mi mi mi/hr hr
---------------------------
Now rewrite equations
and
Substituting
And from above,
Substituting
Rewriting:
Use the quadratic formula
and (reject the negative answer)
From above:
The average speed driving to California was 60 mi/hr
check answer:
OK
