Factor completely.5x3 + 15x2y - 50xy2
A. 5x(x + 2y)(x - 5y)
B. (5x2 + 10xy)(x - 5y)
C. 5x(x - 2y)(x + 5y)
D. Prime
Answer: C
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Graph the circle.x2 + y2 - 6x + 10y = -18
A. 
B. 
C. 
D. 
Use the given information to find the exact value of the trigonometric function.cos ? = 
; The terminal side of ? lies in Quadrant IV.
Find cos 
.
A. 
B. 
C. - 
D. - 
Solve the problem.An object is thrown upward with an initial velocity of 13 feet per second. Its height is given by 
at time t seconds. After how many seconds does it hit the ground?
A. 3 sec B. 7 sec C. 9 sec D. 6 sec
The displacement d (in meters) of an object at time t (in seconds) is given. Describe the motion of the object. What is the maximum displacement from its resting position, the time required for one oscillation, and the frequency?d = -2 cos 
A. simple harmonic; 2 m; 
sec; 4 oscillations/sec
B. simple harmonic; -2 m; 4 sec; 
oscillation/sec
C. simple harmonic; 2 m; 4 sec; 
oscillation/sec
D. simple harmonic; 2 m; 2 sec; 
oscillation/sec