Answer
empty set
Work Step by Step
An empty set, or a null set, is a set that contains no members. The empty set is a subset of every set.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 3 - Solving Inequalities - Chapter Review - Page 222: 3
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