Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 7 Exponential and Logarithmic Functions - 7.3 Use Functions Involving e - 7.3 Exercises - Mixed Review - Page 498: 67

Answer

8

Work Step by Step

Using the rules of Algebra, we find: $$\left(\sqrt{5x+9}\right)^2=7^2\\ 5x+9=49 \\ x=8$$
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