Solve the inequality algebraically. Express the solution in interval notation.(x + 2)(x + 1)(x - 1) > 0
A. (-?, -2) ? (-1, 1)
B. (-2, -1) ? (1, ?)
C. (-?, -1)
D. (1, ?)
Answer: B
Mathematics
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Using a sum or difference identity, write the following as an expression involving functions of x.sin 
A. 
cos x + 
sin x
B. -cos x
C. 
cos x - 
sin x
D. sin x
Mathematics
Simplify by finding the absolute value.?-17?
A. 17 B. 34 C. -17 D. 0
Mathematics
Find the center (h, k) and radius r of the circle. Graph the circle.x2 + y2 + 6x + 4y - 12 = 0 
A. (h, k) = (3, 2); r = 5
B. (h, k) = (3, -2); r = 5
C. (h, k) = (-3, 2); r = 5
D. (h, k) = (-3, -2); r = 5
Mathematics
Use Cramer's rule to solve the system of linear equations.0.670x + 2.773y = 13.1021.728x = 0.039y + 5.028
A. (3, 4) B. (-4, 3) C. (4, 3) D. (-3, -4)
Mathematics