Perform the indicated operations and simplify. Assume all variables represent positive real numbers.
+ 5
+ 2
A. 20
B. 7
C. 7
D. 20
Answer: A
Mathematics
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A. does not exist B. 5 C. 0 D. -5
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A. - , 7
B. -7, 2
C. , -
D. - , 2
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