College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.5 - Page 75: 115


a. $0.36x$ b. No, 36% of its original price

Work Step by Step

a. $(x-0.4x)-0.4(x-0.4x)$ Factor out $(x-0.4x)$ $ = (x-0.4x)(1-0.4)$ Factor out $x $ from $ (x-0.4x)$ $ = x(1-0.4)(1-0.4)$ $ = x(1-0.4)^{2}$ $ = x(0.6)^{2}$ $ =(0.36) x$ b. From part (a), sale price of the computer is $ =(0.36) x$ $ =(36/100 ) x$ where x is the original price Sale price of the computer is 36 % of original price.
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