Solve the inequality.x3 + 2x2 - 63x > 0
A. (-?,-9) or (0, 7)
B. (-7, 0) or (9, ?)
C. (-9, ?)
D. (-9, 0) or (7, ?)
Answer: D
Mathematics
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Sketch D and g(D) from the description of D and change of variables 
x = u + v, y = 2u - v where D is the rectangle 0 ? u ? 1, -1 ? v ? 1
?
A.
 ? |  |
B.
 ? |  |
C. None of these.
D.
 ? |  |
Mathematics
Graph the line.Through (9, 0), m = - 
A. 
B. 
C. 
D. 
Mathematics
Find the product.-8 ? (-8m)
A. 64m B. -16m C. -16 + m D. -64m
Mathematics
Simplify the expression. If any variables exist, assume that they are positive.
+ 
A. 
B. 4x
C. 4
D. 2
Mathematics