Find the partial derivative.Find 
(2, -3) when f(x, y) = 7xy - 6y.
A. 8
B. 14
C. 0
D. -21
Answer: A
Mathematics
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Find the limit, if it exists.
A. -? B. ? C. 1 D. - 1
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Evaluate the expression, given x = -2, y = 3, and a = -4.
A. - 1
B. 
C. 
D. 
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Simplify.
A. 
B. 
C. 10x(x + 7)
D. 
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Multiply.(6 + 6i)(2 + 4i)
A. 24i2 + 36i + 12 B. -12 - 36i C. -12 + 36i D. 36 - 12i
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