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math

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the product of two positive numbers is 9 18/25 and one of them is three times the other. find the numbers.

  • math -

    X = 1st. number, 3X = 2Nd number.
    3X*X = 9 18/25
    3X^2 = 9 18/25 = 243/25
    X^2 = 243/75 = 81/25
    X = sqrt(81/25) = 9/5 = 1 4/5 = 1st number
    3X = 3 * 9/5 = 27/5 = 5 2/5 = 2Nd
    number.

  • math -

    Data:
    let x and y are two possative numbers
    xy = 9 18/25 = 243/25
    x = 3y
    calculate
    x = ?
    y = ?

    Solution
    xy = 243/25
    3y.y = 243/25
    3y2 = 243/25
    divide 3 to both side
    y2 = 81/25
    square root to both side
    y = 9/5
    for x
    x = 3y
    x = 3.9/5
    x = 27/5
    hence two positive number are 9/5 and 27/5

  • math -

    1 4/5, 5 2/5

  • math -

    1 4/5, 5 2/5

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