Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter P - Section P.1 - Algebraic Expressions, Mathematical Models, and Real Numbers - Exercise Set - Page 19: 133

Answer

a. 1200-0.07x b. 780

Work Step by Step

a. 0.05x+1200-0.12x Combine like terms to simplify the equation 1200-0.07x b. 1200-0.07x Using the equation you simplified in part a, substitute 6000 for x to get the total interest. 1200-0.07(6000) =1200-420 =780
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