Find sum of the pair of complex numbers.-9i, -4i
A. -13i
B. -4 - 9i
C. -9 - 4i
D. -13
Answer: A
Mathematics
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f(x)
A. ?
B. - 
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D. 
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A. Identity B. Not an identity
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A. 2100 L B. 0.021 L C. 21,000 L D. 0.21 L
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