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16-11-2018
Mathematics

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a polygon has sides 3x-1, 2x+2, 7x-3 and 3x. what's the perimeter

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16-11-2018

The perimeter of a polygon is the sum of lengths of sides.

P = (3x - 1) + (2x + 2) + (7x - 3) + 3x

combine like terms

P = (3x + 2x + 7x + 3x) + (-1 + 2 - 3) = 15x - 2

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