Answer
-12
Work Step by Step
Because the signs are the same, add the absolute value if (-3) and (-9) which is 9 + 3 = 12, and put a negative sign in front of the result, -12
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 2 - Section 2.1 - Addition of Signed Numbers - Signed Numbers Drill 1 - Page 109: 26
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