Algebra 2 (1st Edition)

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

Chapter 10 Counting Methods and Probability - Extension - Apply Set Theory - Practice - Page 716: 12



Work Step by Step

We say that $A$ is a subset of $B$ if $B$ contains all elements in $A$. Hence here the subsets are: $\{\},\{-2\},\{4\},\{9\},\{-2,4\},\{-2,9\},\{4,9\},\{-2,4,9\}$
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