Find the cross-product and determine whether the proportion is true or false. = 

A. 120 = 120; true
B. 200 ? 72; false
C. 240 = 240; true
D. 60 ? 240; false


Answer: A

Mathematics

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A. (-?, 6)

B. (-?, 6]

C. [6, ?)

D. (6, ?)

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