Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - 2-5 Literal Equations and Formulas - Lesson Check - Page 112: 5


Length = 40 yd.

Work Step by Step

The formula for the perimeter is P=2L +2W. L represents the length and W represents the width. Plug your known values into this equation. We know that the perimeter is 120 and the length is 20. Therefore, we can rewrite this equation as: 120=2(20) +2L Simplify the right side of this equation by multiplying 2 and 20 together to get: 120=40+2L Next, subtract 40 from both sides to get: 80=2L After that, simply divide L by 2 to get rid of the coefficient, giving us: L=40 yd.
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