Use Cramer's rule to solve the system. If D = 0, use another method to complete the solution. x - y + 4z = -125x + z = -4 x + 2y + z = -12
A. ?
B. {(0, -4, -4)}
C. {(-4, -4, 0)}
D. {(-4, 0, -4)}
Answer: B
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Solve the problem.An office manager needs to buy new filing cabinets. Cabinet A takes up 8 square feet of floor space. Cabinet B takes up 4 square feet of floor space. The office has room for no more than 32 square feet of cabinets. Thus, 
where x is the number of A cabinets and y is the number of B cabinets. Does the office have enough floor space for 3 A cabinets and 4 B cabinets?
A. Yes B. No
Provide an appropriate response.The table shows the number of pupils per teacher in selected counties in a certain state. 
Which counties have a figure that is at most 12.5?
A. Addison, Branson, Cumberland, Dixson, Kendall, Putnum B. Hendricks C. Addison, Branson, Cumberland, Kendall, Putnum D. Dixson, Hendricks
Add or subtract as indicated. Write your answer in the form a + bi.(-8 + 7i) - 3
A. -5 - 7i B. -11 + 7i C. 11 - 7i D. -5 + 7i
Solve.-5 = z - 7.9
A. 12.9 B. -12.9 C. 2.9 D. -2.9