SOLUTION: I need help with the problem: A car traveled for 1/2 hour at r mi/h , then increased the speed by 10 mi/ and traveled for 1 and 1/2 hours more. how far did the car go ( the answ

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Question 333507: I need help with the problem:
A car traveled for 1/2 hour at r mi/h , then increased the speed by 10 mi/ and traveled for 1 and 1/2 hours more. how far did the car go ( the answer must be expressed in the form of r )
Thank You ! , Any help is appreciated :)

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
A car traveled for 1/2 hour at r mi/h , then increased the speed by 10 mi/ and traveled for 1 and 1/2 hours more. how far did the car go ( the answer must be expressed in the form of r )
..
the speed of car was r mph
it traveled for half hour.
distance traveled = 1/2 *r
..
then speed was (r+10)mph
time driven = 3/2 hours
distance traveled = 3/2 * (r+10)
..
Total distance traveled = r%2F2+%2B+3%2F2%2A%28r%2B10%29
=%28r%2B3r%2B10%29%2F2
=%284r%2B10%29%2F2
=2%2A%282r%2B5%29%2F2
=2r%2B5+miles