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9 August, 16:56

Then, the dot ran from - 81 to 81. What distance did it cover? If the average speed of the dot during this run was 18 units per minute, how long did this run take?

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  1. 9 August, 17:02
    0
    Distance = 162 units

    Time 9 minutes

    Step-by-step explanation:

    The distance from - 81 to 0 is 81 units

    The distance from 0 to 81 is 81 units

    The total distance is 81+81 = 162 units

    OR

    81 - (-81) = 162

    Distance = 162 units

    Distance = rate * time

    We know the distance and the rate = 18 units per minute

    162 = 18 * time

    Divide each side by 18

    162/18 = 18/18 * time

    9 = time

    The time is 9 minutes
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