Factor by grouping.2y3 + 8y2 - 12y2 - 48y
A. 2y(y + 4)(y - 6)
B. (y + 4)(y - 6)
C. 2y(y - 4)(y + 6)
D. (y + 4)(2y2 - 12y)
Answer: A
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Solve the problem.The position(in feet) of an object oscillating up and down at the end of a spring is given by 
at time t (in seconds). The value of A is the amplitude of the motion, k is a measure of the stiffness of the spring, and m is the mass of the object. Find the object's velocity at time t.
A. v = - A
cos 
ft/sec
B. v = A
cos 
ft/sec
C. v = A
cos 
ft/sec
D. v = A cos 
ft/sec
Evaluate the integral using the given substitution.
dx, u = 9x2
A. 
sin (9x2) + C
B. 
sin (9x2) + C
C. 
sin (u) + C
D. sin(9x2) + C
Solve the problem.An internet user is participating simultaneously in one-on-one chat sessions with 5 other people. Draw a graph with vertices representing users and edges representing chat sessions. How many chat sessions are occurring?
What will be an ideal response?
Solve the problem.If a graph has 7 vertices and M is the number of vertices of odd degree, then M cannot be
A. 4. B. 7. C. 3. D. 0. E. none of these