Find the partial derivative.Find fx(5, -4) when f(x,y) = 7x2 - 9xy.
A. 34
B. -5
C. 106
D. -34
Answer: C
Mathematics
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Factor by grouping.xy + y + 9x + 9
A. (x + 1)(y + 9) B. (x + 9)(y + 1) C. (x + 1)(9y + 9) D. (9x + 9)(y + 1)
Mathematics
Evaluate.i23
A. i B. -1 C. -i D. 1
Mathematics
Write the statement as an inequality.z is less than or equal to 3
A. z ? 3 B. z > 3 C. z < 3 D. z = 3
Mathematics
Solve the equation.10m2 - 3m = 0
A. 
B. 
C. {0}
D. 
Mathematics