Brad walks and jogs to school every day. He averages 5 km hr walking and 9 km hr jogging. The distance from home to school is 6 km and the total trip takes 1 hour. This means that he walks about 3.75 km of the distance. 6-x/9 + x/5 = 1 9x +30 - 5x = 45 4x = 15 x = 3.75 km
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3.75 or 3.7 or 3.8 or 3.750 kilometers