Inequalities

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  1. zed963's Avatar
    1 26-07-2012  07:42
    • Overlord in Training
    • Posts: 2,134
    Inequalities
    A rectangular field has length (2x+8)metres and width (4x-3) metres
    The perimeter of the field is no more than 112 metres. Find the greatest possible area of the field.

    I've done this question now.
    Last edited by zed963; 26-07-2012 at 07:57.
  2. Kallisto's Avatar
    2 26-07-2012  08:42
    • Overlord in Training
    • Location: Look at my flag!
    • Posts: 2,530
    Re: Inequalities
    As far as I understand the perimeter is no more than 112. Then you have this inequation for a perimeter of a rectangular:

    2 *(2x+8 + 4x-3) < (or equal) 112. (2x+8 = a and 4x-3 = b)

    I would recommend you to form an equation which is equal 112. Then I would solve to x to see
    what is the highest value for x. All right?
    Last edited by Kallisto; 26-07-2012 at 08:47.
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