Write the partial fraction decomposition of the rational expression.
A. 
+ 
B. 
+ 
C. 
- 
D. 
+ 
Answer: D
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Solve the problem.Assume that the mathematical model C(x) = 19x + 170 represents the cost C, in hundreds of dollars, for a certain manufacturer to produce x items. How many items x can be manufactured if the cost is to be kept between $739,000 and $1,100,000?
A. {x 
570 < x < 760}
B. {x 
600 < x < 800}
C. {x 
380 < x < 570}
D. {x 
400 < x < 600}
Solve the problem.The variable z varies jointly as the third power of x and the second power of y. When 
and 
Approximate the constant of variation to three significant digits.
A. 3.23 B. 6.63 C. 4.73 D. 3.63
Solve the linear system by using an inverse matrix.
A. {(-4, 3)} B. {(3, -4)} C. {(4, -3)} D. {(-3, 4)}
Solve the problem.4 - x ? 6x + 5 and 3x - 20 ? 6x + 20
A. 
B. 
? 
C. 
D. 