Add or subtract, if possible. Assume that all variables represent non-negative values and be sure to simplify your answer.3
- 2
-
- 5
A. -31 + 45
B. 31 - 45
C. 31 + 45
D. -31 - 45
Answer: B
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A.
B.
C. -
D.
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A.
B. -
C.
D. -