Find the values of x for which the expression is a real number.

A. (-?, 20)
B. [20, ?)
C. (20, ?)
D. (-?, 20]

Answer: A

Mathematics

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A. 1
B.
C. 15
D. 0

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A. 0 B. -3 C. -1 D. 1

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Fill in the blank(s) with the appropriate word(s).

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