Tell whether the expression is a polynomial. If it is, give its degree.-8z2 + z
A. Polynomial; degree 3
B. Polynomial; degree 2
C. Polynomial; degree 1
D. Not a polynomial
Answer: B
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A. 512 B. 81 C. 362,880 D. 18
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Find the domain of the rational expression. 
A. {x|x is a real number and x ? 8} B. {x|x is a real number and x ? 8 and x ? 1} C. {x|x is a real number} D. {x|x is a real number and x ? -8}