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16 November, 13:36

A woman walks a constant speed of 4.5km per hour. How long will it take her to walk 10 km? Use the formula d=st. write the answer in hours and mintues rounded to the nearest minute.

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Answers (2)
  1. 16 November, 14:37
    0
    You must evaluate the function f first.

    Division by 0 is undefined.

    The composition cannot be evaluated.
  2. 16 November, 15:43
    0
    d = st

    distance = speed * time

    10 = 4.5 * t

    divide each side by 4.5

    10/4.5 = t

    100/45 = t (can't have a decimal in a fraction so I multiply by 10/10)

    divide top and bottom by 5

    20/9

    2 and 2/9 hours

    to get minutes multiply 2/9 by 60

    2/9 * 60

    120/9

    13 3/9

    13 1/3 minutes

    2 hours 13 1/3 minutes

    to the nearest minutes

    2 hours 13 minutes
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