Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x = -9
B. x = 9, x = 8
C. x = 9
D. none
Answer: C
Mathematics
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State whether the function is a polynomial function or not. If it is, give its degree. If it is not, tell why not.f(x) = 
A. Yes; degree 3 B. Yes; degree -4 C. No; it is a ratio of polynomials D. Yes; degree 4
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Graph the equation.y = -7x
A. 
B. 
C. 
D. 
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Sketch the graph. Find the coordinates of the foci and the lengths of the major and minor axes.
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In each group of four products, one is wrong. Use estimation to determine which product is incorrect.
A. 191 × 46 = 8786 B. 313 × 82 = 26,096 C. 394 × 80 = 31,520 D. 34 × 348 = 11,832
Mathematics