SOLUTION: Jessie recently drove to visit her parents who live 60 miles away. On her way there her average speed was 9 miles per hour faster than on her way home (she ran into some bad weathe
Algebra ->
Customizable Word Problem Solvers
-> Travel
-> SOLUTION: Jessie recently drove to visit her parents who live 60 miles away. On her way there her average speed was 9 miles per hour faster than on her way home (she ran into some bad weathe
Log On
Question 1087790: Jessie recently drove to visit her parents who live 60 miles away. On her way there her average speed was 9 miles per hour faster than on her way home (she ran into some bad weather). If Jessie spent a total of 3 hours driving, find the two rates. Found 2 solutions by jorel1380, MathTherapy:Answer by jorel1380(3719) (Show Source):
You can put this solution on YOUR website! Let n be Jessie's speed on her way to her parents. Then her speed back home would be n-9. So:
60/n + 60/n-9=3
60(n-9)+60n=3nē-27n
3nē-147n+540=0
nē-49n+180=0
(n-45)(n-4)=0
n=45 or 4
☺☺☺☺
You can put this solution on YOUR website! Jessie recently drove to visit her parents who live 60 miles away. On her way there her average speed was 9 miles per hour faster than on her way home (she ran into some bad weather). If Jessie spent a total of 3 hours driving, find the two rates.
FYI: The rate going can never, IN A MILLION YEARS, be 4 mph, so TOTALLY IGNORE anyone who says it can be.
I leave that to you to determine why.
