Solve. +  = -1

A. -  ± i
B.  ± i
C. -  ± 
D.  ± 


Answer: A

Mathematics

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Simplify the expression.(10 + 8)(10 + 7)

A. 480 + 150
B. -80 + 150
C. 100 + 56 + 150
D. 100 + 56

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