Factor by grouping.5x + 40 + xy + 8y
A. (y + 8)(5x + y)
B. (y + 8)(x + 5)
C. (x + 8)(5 + y)
D. (x + 8y)(5 + y)
Answer: C
Mathematics
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Provide an appropriate response.Write 
as an imaginary number.
A. 4i B. -2i C. 2i D. -4i
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Evaluate.(-2)3
A. -4 B. 8 C. 2 D. -8
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Simplify the expression. Assume that all variables are positive when they appear.
A. 
B. 
C. 
D. 
Mathematics
Write the expression in the form bi, where b is a real number.
A. -9i
B. 9i
C. ±9
D. i
Mathematics