Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - Chapter R Test Prep - Review Exercises: 44

Answer

$\color{blue}{-\dfrac{27}{4}\text{ or } -6.75}$

Work Step by Step

Evaluate using the PEMDAS rule for order of operations. The PEMDAS rule summarizes the order of operations: First Priority; P - parentheses Second Priority: E - exponents Third Priorirty: M/D - multiplication or division, whichever comes first from the left Fourth Priority: A/S - addition or subtraction, whichever comes first from the left Simplify within grouping symbols first:: $=(-3)(-9)\div (-4)$ Multiply. Note that the product of two numbers with the same sign is positive. $=27 \div (-4)$ Divide. Note that the quotient of two numbers with different signs is negative. $=\color{blue}{-\dfrac{27}{4}\text{ or } -6.75}$
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