Answer
23
Work Step by Step
First do square roots, then multiply, then add and subtract.
2 + 1 - 2 * \sqrt 1 + 4 * \sqrt 81 - 7 * 2 = 2 + 1 - 2 * 1 + 4 * 9 - 7 * 2 = 2 + 1 - 2 + 36 - 14 = 23
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Chapter 1 - Whole Numbers - 1.8 Exponents, Roots, and Order of Operations - 1.8 Exercises - Page 81: 87
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