Perform the indicated operation and simplify. 
- 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Combine and simplify, if possible.2
- 9
A. -7
B. -20
C. 16
D. -16
Mathematics
Solve the problem.Find k such that the line -kx + 5y = 4 is parallel to the line through (5, -8) and (2, 4).
A. k = -19.5 B. k = -19 C. k = -22 D. k = -20
Mathematics
Factor the polynomial completely.x2 + 2xy - 24y2
A. (x + 6y)(x - 4y) B. (x - 6y)(x + 4y) C. (x - y)(x + 4y) D. (x - 6y)(x + y)
Mathematics
Find the sum Sn of the first n terms of the geometric sequence. 
, - 
, 1, - 2, 4, . . . .; n = 9
A. 
B. 
C. 
D. 
Mathematics