Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 1 - Section 1.7 - Exponents and Order of Operations - Exercise Set - Page 74: 79



Work Step by Step

Solve using PEMDAS (The priority list for solving expressions: Parentheses, exponents, [multiplication, division], [addition, subtraction]. For the operations in the brackets, solve from left to right) $\dfrac{2+4^2}{5(20-16)-3^2-5} = \dfrac{2+4^2}{5\cdot 4-3^2-5} = \dfrac{2+16}{5\cdot 4-9-5} = \dfrac{2+16}{20-9-5} = \dfrac{18}{6} = 3$
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