Find the difference.-28 - (-28)
A. -56
B. 56
C. 84
D. 0
Answer: D
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Calculate the direction of 
and the midpoint of line segment P1P2.P1(8, -6, 4) and P2(9, -7, 5)
A. 
i + 
j + 
k; 
B. 
i - 
j + 
k; 
C. 
i - 
j + 
k; 
D. 
i - 
j + 
k; 
Answer the question.If p(x) = 54x3 + 57x2 - 42x - 6 and q(x) = 6x + 9, find (p/q)(x).
A. 9x2 - 4x - 1 + 
B. 9x2 - 4x - 1 - 
C. 9x2 - 4x - 1
D. 9x2 - 4x - 1 + 
Solve the problem.If f(?) = cos ? and f(a) = - 
, find the exact value of f(a) + f(a - 2?) + f(a + 4?).
A. - 
B. - 
C. -36
D. -12
Determine the intervals on which the function is increasing, decreasing, and constant.
A. Increasing on (-3, -1); Decreasing on (-5, -2) and (2, 4); Constant on (-1, 2) B. Increasing on (-3, 0); Decreasing on (-5, -3) and (2, 5); Constant on (0, 2) C. Increasing on (-3, 1); Decreasing on (-5, -3) and (0, 5); Constant on (1, 2) D. Increasing on (-5, -3) and (2, 5); Decreasing on (-3, 0); Constant on (0, 2)