Factor the special products.x2 + 18xy + 81y2
A. (x + 9y)(x - 9y)
B. (x + 9y)2
C. (x - 9y)2
D. prime
Answer: B
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Compute the gradient of the function at the given point.
A. ?f = 
i - 
j
B. ?f = 
i + 
j
C. ?f = - 
i - 
j
D. ?f = - 
i + 
j
Factor completely.75a4 - 108b2
A. 3(5a2 + 6b)(5a2 - 6b) B. 3(5a2 - 6b)2 C. (15a2 + 18b)(5a2 - 6b) D. 3(5a2 + 6b)2
Solve the problem.Khang and Hector live 22.8 miles apart in southeastern Missouri. They decide to bicycle towards each other and meet somewhere in between. Hector's rate of speed is 90% of Khang's. They start out at the same time and meet 2 hours later. Find Hector's rate of speed.
A. 12 mph B. 5.4 mph C. 6 mph D. 22.8 mph
Find the volume under the surface z = f(x,y) and above the rectangle with the given boundaries.z = x2 + y2; 0 ? x ? 1, 0 ? y ? 1
A. 
B. 
C. 
D. 