Subtract.44 - (-49)
A. -5
B. -93
C. 93
D. 5
Answer: C
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Evaluate. Write the answer as a mixed number whenever possible.Two-thirds of 
A. 4
B. 5
C. 
D. 
In electrical circuits, the impedance Z (or opposition to the flow of electricity), voltage V, and current I can all be represented by complex numbers. They are related by the equation Z = 
. Use this equation to find the value of the missing variable.V = 56 - 42i, I = 4 + 2i
A. Z = 4 + 26i B. Z = 4 - 26i C. Z = 7 - 14i D. Z = 7 + 14i
Solve the problem.Sales of CD players in a particular U.S. market are shown in the given table for various years. Let s be the sales of CD players (in thousands) for the year that is t years since 1990. A quadratic model for the sales is 
According to the model, how many CD players were sold in 1997? Is this number an underestimate, an overestimate, or neither? CD Player Sales
A. 185 thousand; neither B. 275 thousand; overestimate C. 275 thousand; underestimate D. 200 thousand; overestimate
Solve the system by the elimination method.4x + 6y = 1516x + 24y = 60
A. {(6, 1)} B. ? C. {(x, y)| 4x + 6y = 15} D. {(0, 4)}