## Algebra 1

$X\cap Y\cap Z$={ }
$X\cap Y\cap Z$ is the intersection of the 3 sets. To be included in the intersection, a member must appear in all 3 of the sets. X={3, 6, 9} Y={2, 3, 7, 8} Z={0, 2,4, 6, 8} Eliminate the members that do not belong to all 3 sets. $X=\{/\!\!\!3, /\!\!\!6, /\!\!\!9\}$ $Y=\{/\!\!\!2, /\!\!\!3, /\!\!\!7, /\!\!\!8\}$ $Z=\{/\!\!\!0, /\!\!\!2, /\!\!\!4, /\!\!\!6, /\!\!\!8\}$ Since there is no member that appears in all 3 sets, the intersection is an empty set.