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11 July, 21:48

It took 4 hours to clean 10 houses, how many houses could be cleaned in 8 hours?

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Answers (2)
  1. 11 July, 21:50
    0
    3 1/2 houses

    Step-by-step explanation:

    To find the unit rate we must divide 4 by 10

    4 hours divided by 10 house = 1/4

    1/4 houses per hour

    8 hours times 0.4 = 3.2 houses
  2. 11 July, 22:02
    0
    20 houses

    Step-by-step explanation:

    Let's make a proportion using this setup:

    houses/hours=houses/hour

    We know that 10 houses can be cleaned in 4 hours. We don't know how many houses can be cleaned in 8 hours, so we can say x houses can be cleaned in 8 hours.

    10 houses/4 hours = x houses/8 hours

    10/4=x/8

    Now we have to solve for x, by getting x by itself. Perform the opposite of what is being done to both sides.

    x is being divided by 8. The opposite of division is multiplication, so multiply both sides by 8

    8 (10/4) = (x/8) 8

    8 (10/4) = x

    8 (2.5) = x

    20=x

    20 houses can be cleaned in 8 hours.
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