Answer
Her average monthly amount of expenses was $1,850$ dollars.
Work Step by Step
$\frac{3100+2000+1800+1400+1600+1200}{6} = 1850$
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 9 - Basic Algebra - Summary Exercises - Operations with Signed Numbers - Page 657: 55
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