Factor completely. If the polynomial is prime, state this.y2 - 9
A. (y + 3)(y - 3)
B. (y - 3)2
C. (y2 + 3)(y2 - 3)
D. (y + 9)(y - 9)
Answer: A
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Find all the second order partial derivatives of the given function.f(x, y) = 
A. 
= 
; 
= - 
; 
= 
= 
B. 
= - 
; 
= 
; 
= 
= 
C. 
= - 
; 
= 
; 
= 
= 
D. 
= - 
; 
= 
; 
= 
= 
Solve the problem.If you raise 9 to the 387th power, what is the units digit of the result?
A. 1 B. 6 C. 9 D. 7
Express the statement as an equation involving the indicated variables.The perimeter P of a rectangle is twice the sum of its length l and its width w.
A. P = l + w B. P = 2(l + w) C. P = 2lw D. P = lw
Solve the problem.The area of a triangular poster is 832 square centimeters. Its altitude is 12 feet shorter than twice its base. Find the lengths of the altitude and base.
A. base = 64 cm; altitude = 13 cm B. base = 32 cm; altitude = 26 cm C. base = 32 cm; altitude = 52 cm D. base = 16 cm; altitude = 52 cm