Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer.  + 

A. 8
B. 56
C. 8
D. -4


Answer: A

Mathematics

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A. 19
B. 19
C. 19
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? ? A. 16.28 cm B. 9.14 cm C. 11.14 cm D. 14.28 cm E. 20.57 cm

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A.

B.

C.

D.

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