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6 March, 18:10

You are given a piece of cardboard and asked to cut out a square of area (169y2 + 260y + 100) cm2. The side length of the square is ax + b cm, where a and b are whole numbers. Find an expression for the perimeter of the square. Find the perimeter when y = 10 cm.

A. p = 17y + 10; 180 cm

B. p = 68y + 40; 720 cm

C. p = 52y + 40; 560 cm

D. p = 13y + 10; 140 cm

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  1. 6 March, 21:57
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    Square root of area = (13y + 10) cm = length of each side of the square piece.

    perimeter is

    p = 4 (13y + 10)

    = 52y + 40 Answer

    when y = 10 p = 560 answer

    Option C is the correct one.
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