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 ?
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t = time at 100 km/hr
100*t + 80*(5.5-t) = 500
20t + 440 = 500
t = 3 hours
etc