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8 June, 18:06

20 millimeters long with an area of (20x-200) square millimeters. Write an expression that represents the perimeter (in millimeters) of the octopus pupil.

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  1. 8 June, 20:03
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    Perimeter = (20 + 2x) mm.

    Step-by-step explanation:

    The octopus pupil has length 20 mm and the expression for its area is given by (20x - 200) square mm.

    If the width of the octopus pupil is w, then 20w = 20x - 200

    ⇒ w = (x - 10) mm.

    Therefore, the expression for its perimeter is 2 (Length + Width) = 2 (20 + x - 10) = 2 (10 + x) = (20 + 2x) mm. (Answer)
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