Answer
21
Work Step by Step
5+9$\times$4-20 Multiply 9 and 4
=5 + 36 -20 Add and subtract from left to right
=41 - 20
= 21
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 2 - Section 2.5 - Order of Operations - Exercise Set - Page 138: 16
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