Find the intervals on which the function is increasing and the intervals on which the function is decreasing.f(x) = x2 - 12x - 28
A. Increasing on (-?, - 6); decreasing on (- 6, ?)
B. Increasing on (-?, 6); decreasing on (6, ?)
C. Increasing on (- 6, ?); decreasing on (-?, - 6)
D. Increasing on (6, ?); decreasing on (-?, 6)
Answer: D
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Solve the problem."If choice X is a winner of an election and, in a reelection, the only changes in the ballots are changes that only favor X, then X should remain a winner of the election." This fairness criterion is called the
A. Condorcet criterion. B. independence of irrelevant alternatives criterion. C. monotonicity criterion. D. majority criterion. E. none of these
Solve and check.c + (-13) = 6
A. c = 19 B. c = 7 C. c = -19 D. c = -7
Find all cube roots of the complex number. Leave answers in trigonometric form.-6
- 6i
A. 
cis 70°, 
cis 190°, 
cis 310°
B. 
cis 80°, 
cis 200°, 
cis 320°
C. 
cis 70°, 
cis 190°, 
cis 310°
D. 
cis 70°, 
cis 190°, 
cis 310°
Solve using Cramer's rule. 4a- 4c = 4 3a + 7b + 2c = 86 2a - 4b= -26
A. (5, 9, 4) B. (9, 4, 9) C. (6, 7, 4) D. (5, -9, -4)