Answer
$\{a,c\}$
Work Step by Step
The elements both in $A$ and $B$ are: $A\cap B=\{a,c\}$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 4 - Section 4.5 - Linear Programming - Review Exercises - Page 309: 9
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