Answer
A normal lesson costs $30$, and the first lesson costs $45$.
Work Step by Step
Let a normal lesson cost $x$. Then the total costs are: $9\cdot x+1.5x=315\\10.5x=315\\x=30$.
Thus a normal lesson costs $30$, and the first lesson costs $45$.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 1, Equations and Inequalities - 1.5 Use Problem Solving Strategies and Models - 1.5 Exercises - Quiz for Lessons 1.3-1.5 - Page 40: 11
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