Does the system have a unique solution, no solution, or many solutions?
A. No solution
B. A unique solution
C. Many solutions
Answer: B
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Factor completely.8a3 - 27b3
A. (2a + 3b2)(4a2 - 6ab + 9b2) B. (2a - 3b)(4a2 + 6ab + 9b2) C. (2a - 3b)(4a2 + 9b2) D. (8a - 3b)(a2 + 6ab + 9b2)
Complete the equation so the result is an identity. 
+ sin2x = 1
A. tan2x B. sin2x C. csc2x D. cos2x
Solve the problem.A balloon (in the shape of a sphere) is being inflated. The radius is increasing at a rate of 11 cm per second. Find a function, r(t), for the radius in terms of t. Find a function, V(r), for the volume of the balloon in terms of r. Find (V ? r)(t).
A. (V ? r)(t) = 
B. (V ? r)(t) = 
C. (V ? r)(t) = 
D. (V ? r)(t) = 
Find the distance between P and Q and the coordinates of the midpoint of the segment joining P and Q.
A. 4
; 
B. 4; 
C. 4
; 
D. 4; 