The width of a rectangle is 9 inches more than 4 times the length. If x represents the length, write an algebraic expression in terms of x that represents the perimeter of the rectangle. Simplify the expression. x = length 4x + 9 = width Perimeter of a rectangle is 2(length) + 2(width) 2(x) + 2(4x + 9) = perimeter {substituted given information into perimeter formula} 2x + 8x + 18 = perimeter {used distributive property} 10x + 18 = perimeter {combined like terms} © Algebra House
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