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Oral exercisex?

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susan drove for 2 hours at 85 km/h and then for 3 hours more at 95 km/h. what was her average speed for the entire trip.

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  1. Dang...larkin beat me to it!!  Good job larkin!


  2. 91 km/h

    2x85=170 km

    3x95=285

    total kms driven=455

    divided by total time (5) = 91

    Thank you Angel Pie!
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