SOLUTION: Sheri drove southeast from Alberquerque to Roswell and then south to Carlsbad. She averaged 75 mph along the route from Alberquerque to Roswell and averaged 70 mph from Roswell to

Algebra ->  Algebra  -> Systems-of-equations -> SOLUTION: Sheri drove southeast from Alberquerque to Roswell and then south to Carlsbad. She averaged 75 mph along the route from Alberquerque to Roswell and averaged 70 mph from Roswell to       Log On

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Question 89548: Sheri drove southeast from Alberquerque to Roswell and then south to Carlsbad. She averaged 75 mph along the route from Alberquerque to Roswell and averaged 70 mph from Roswell to Carlsbad. She covered the entire 220 miles in 3 hours. How long did she take to drive from Alburquerque to Roswell?
Answer by scott8148(5891) About Me  (Show Source):
You can put this solution on YOUR website!
rate*time=distance ... let x equal the time from A to R ... 75x+70(3-x)=220 ... 75x+210-70x=220 ... 5x=10 ... x=2