Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 9 - Roots and Radicals - 9.2 - Simplifying Radicals - Problem Set 9.2: 71

Answer

Actual values: a) 38.3 b) 50.3 c) 143.7 d) -83.4 e) 155.6 f) 47.4

Work Step by Step

To simplify, we approximate using the closest perfect square to each number: a) $3(3) - 4(5) + 6(8) = 37$ b) $ 9(5) + 5(6) - 3(9) = 48$ c) $ 12(2) + 13(4) + 9(7) = 129$ d) $ 3(10) - 4(9) -7(11) = -83$ e) $4(13) + 2(14) +5(15) =155$ f) $-3(16) -6(17) + 11(18) = 44$
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