Add or subtract.(-4mn + 4mn2 - 2m2n2) + 
A. -9mn + 9m2n + 10m2n2
B. 10m2n2
C. 10m2n2 + 5m2n + 4mn2 - 9mn
D. 1mn + 4mn2 + 5m2n + 10m2n2
Answer: C
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Find all the first order partial derivatives for the following function.f(x, y, z) = x2y + y2z + xz2
A. 
= 2xy; 
= x2 + 2yz; 
= y2 + 2xz
B. 
= 2xy + z2; 
= x2 + yz; 
= y2 + xz
C. 
= 2y + z2; 
= x2 + 2z; 
= y2 + 2x
D. 
= 2xy + z2; 
= x2 + 2yz; 
= y2 + 2xz
Solve the equations by factoring.x2 + 12x = -27
A. -9, 3 B. -27, -1 C. 3, 9 D. -9, -3
Find the partial fraction decomposition for the rational expression.
A. 
+ 
B. 
+ 
C. 
+ 
D. 
+ 
Solve the problem.Jill is 8 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 1 km/hr. They meet in 2 hours. How fast is Joe walking?
A. 5 kilometers/hour B. 6 kilometers/hour C. 2 kilometers/hour D. 3 kilometers/hour