Rewrite the equation in standard form. Find the center or vertex. Identify the conic and sketch the curve.y2 - 18y - x + 83 = 0
A. parabola; vertex (2, 9);
x = (y - 9)2 + 2
B. parabola; vertex (2, 9);
x = (y - 9)2 + 2
C. parabola; vertex (9, 2);
x = (y - 9)2 + 2
D. parabola; vertex (9, 2);
x = (y - 2)2 + 9
Answer: A
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Change the numbers to their percent equivalents.4.9
A. 49% B. 0.0049% C. 0.49% D. 490%
Solve the problem.A company manufactures two types of lawn mowers, a gas-powered model and an electric model. It costs 
to produce each of x gas-powered mowers and 
to produce each of y electric mowers, and the company has at most 
per month to use for production. Write the inequality that describes this constraint on monthly production.
A. 98x + 104y ? 86,450 B. 98x + 104y ? 86,450 C. 104x + 98y ? 86,450 D. 104x + 98y ? 86,450
Determine whether the given function is one-to-one. If it is one-to-one, find its inverse function.f(x) = 
A. one-to-one function; f-1(x) = 
B. one-to-one function; f-1(x) = 
C. one-to-one function; f-1(x) = -2x
D. not a one-to-one function
Solve the equation.4-x = 
A. 
B. 
C. {-2}
D. {2}