Solve the system. x - y + 2z = -44x + z = 0 x + 5y + z = 20
A. (0, 0, 4)
B. (0, 4, 0)
C. (0, 4, -4)
D. No solution
Answer: B
Mathematics
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A. {85} B. {-15} C. {-85} D. {15}
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Perform the indicated operations and simplify. Assume that all variables represent positive real numbers.(-3
)2
A. 36
B. 9
C. -36
D. 13
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Find the product. Try to do the work mentally.5 ? 1 ? 0
A. 0 B. 6 C. 1 D. 5
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Find all the real zeros of 
a. x = 6, 1, -8
b. 
c. 
d. 
e. 
Mathematics