Answer
$x\geq 89.3$
Work Step by Step
$\frac{85+95+92+3x}{6}\geq90 \lt=\gt 272+3x \geq 540 \lt=\gt 3x \geq 268 \lt=\gt x\geq 89.3$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 2 - Section 2.7 - Linear Inequalities and Problem Solving - Exercise Set - Page 174: 88
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