algebra

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the number of kilograms of water in a human body varies directly as the mass of the body an 87kg person contains 58kg of water how many kilograms of water are in a 72-kg person

  • algebra -

    water = k(bodymass) where k is a constant
    for the given case
    58 = k(87)
    k= 58/87
    = 2/3

    water = (2/3)(bodymass)
    so if bodymass = 72
    water = (2/3)(72) = 48

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