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Math Help - short question :)

  1. #1
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    Talking short question :)

    okay one more question LOL!!

    Its a quadratic solution

    a bath toy bought for $x is sold for $24, making x% profit. What was the cost of the toy?
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  2. #2
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    x = 24 - 24(x/100)
    x = 24 - 0,24x
    1,24x = 24
    x= 19,35........
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  3. #3
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    Quote Originally Posted by LaylaSam View Post
    okay one more question LOL!!

    Its a quadratic solution

    a bath toy bought for $x is sold for $24, making x% profit. What was the cost of the toy?
    Profit = 24 - x.

    Profit = x% of x = (x/100)x = x^2/100.

    Therefore 24 - x = x^2/100.

    Solve for x. Reject the negative solution.
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  4. #4
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    Nope, Mr Yvginkel

    x(1 + x/100) = 24
    x + x^2/100 = 24
    100x + x^2 = 2400
    x^2 + 100x - 2400 = 0
    (x + 120)(x - 20) = 0

    Wrap it up!
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  5. #5
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    ohh now it kinda makes more sence...
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