Answer
24
Work Step by Step
$n(A\cup B)+n(A\cap B)=n(A)+n(B)$
Thus,
$30+6=12+x$
$x=24$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 10 - Review Exercises - Page 708: 3
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
