SOLUTION: Niccole drove 500km from edmonton to lethbridge in 5.5hrs. she drove part of the way at 100kmh and the rest of the way at 80kmh. how far did she drive at each speed ?

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson  -> Lesson -> SOLUTION: Niccole drove 500km from edmonton to lethbridge in 5.5hrs. she drove part of the way at 100kmh and the rest of the way at 80kmh. how far did she drive at each speed ?      Log On


   

Question 1084404: Niccole drove 500km from edmonton to lethbridge in 5.5hrs. she drove part of the way at 100kmh and the rest of the way at 80kmh. how far did she drive at each speed ?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Niccole drove 500km from edmonton to lethbridge in 5.5hrs. she drove part of the way at 100kmh and the rest of the way at 80kmh. how far did she drive at each speed ?
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t = time at 100 km/hr
100*t + 80*(5.5-t) = 500
20t + 440 = 500
t = 3 hours
etc