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12 September, 11:05

Gary can hike on level ground 3 miles per hour faster than he can on uphill terrain. Yesterday, Gary hiked 10.25 miles, spending 3 hours on level ground and 2 hours on uphill terrain. What is Gary's average hiking speed on level ground

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  1. 12 September, 14:04
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    13.14

    Step-by-step explanation:

    2s + 5 (s-3) = 31

    2s + 5s - 15 = 31

    7s = 31 + 15

    7s = 46

    s = 46/7

    s ~ 6.57 mph on level ground

    Check this by finding the distances

    2 (6.57) = 13.14 mi
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