College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.1 - Page 18: 118



Work Step by Step

Use the order of operations to simplify the expression:$$\frac{6(-4)-5(-3)}{9-10}$$ As the fraction itself defines grouping symbols, the numerator and denominator are each individual groups. Within each group start with exponents, then multiplication and division in order left to right, and finally addition and subtraction left to right:$$=\frac{(-24)+15}{(-1)}$$ $$=\frac{(-9)}{(-1)}$$ $$=9$$ A negative divided by a negative is positive.
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