Solve the system of equations. x - y + 2z = -34x + z = -2 x + 4y + z = -6
A. {(0, -1, -2)}
B. {(-2, -1, 0)}
C. {(-2, 0, -1)}
D. ?
Answer: A
Mathematics
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Solve.The value of a particular investment follows a pattern of exponential growth. In the year 2000, you invested money in a money market account. The value of your investment t years after 2000 is given by the exponential growth model 
When will the account be worth $6639?
A. 2011 B. 2008 C. 2010 D. 2009
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Simplify. Assume that all variables represent non-negative real numbers.
A. -2a2b
B. 2
C. 2ab
D. 2ab
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Find the slope of the line.
A. -2
B. 
C. 2
D. - 
Mathematics