Simplify.
- 
+ 
- 
A. 
B. - 
C. 
D. 
Answer: A
Mathematics
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Solve the problem.Find the center and radius of the sphere with equation 3x2 + 3y2 + 3z2 - 2x + 2y - 9 = 0
A. center = 
; radius = 
B. center = 
; radius = 
C. center = 
; radius = 
D. center = 
; radius = 
Mathematics
Use an identity to write the expression as a single trigonometric function or as a single number.2 cos2 22.5° - 1
A. 
B. 
C. 
D. 
Mathematics
Sketch the graph of the parabola.y = (x - 3)2 - 1
A. 
B. 
C. 
D. 
Mathematics
Factor completely. If a polynomial cannot be factored, say it is prime.2y3 - 4y2 - 30y
A. 2y(y - 3)(y + 5) B. 2y(y + 3)(y - 5) C. (y - 3)(2y2 + 10) D. (2y2 + 6y)(y - 5)
Mathematics