Find the axis of symmetry of the parabola defined by the given quadratic function.f(x) = -7(x - 2)2 - 9
A. x = -7
B. x = -9
C. x = -2
D. x = 2
Answer: D
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Solve.42 is what percent of 21?
A. 100% B. 150% C. 200% D. 50%
Use the properties of parallel lines to solve the problem.If m 
n and m(?6) = 126°, what are the measures of the other angles?
A. m(?2) = m(?4) = m(?8) = 126°, m(?1) = m(?3) = m(?5) = m(?7) = 64° B. m(?5) = m(?7) = m(?8) = 126°, m(?1) = m(?2) = m(?3) = m(?4) = 54° C. m(?2) = m(?4) = m(?8) = 126°, m(?1) = m(?3) = m(?5) = m(?7) = 54° D. m(?2) = m(?4) = m(?8) = 126°, m(?1) = m(?3) = m(?5) = m(?7) = 36°
Solve the problem.Express the gross salary G of a person who earns $10 per hour as a function of the number x of hours worked.
A. G(x) = 
B. G(x) = 10 + x
C. G(x) = 10x
D. G(x) = 10x2
Find the coordinates of the vertex for the parabola defined by the given quadratic function.f(x) = -x2 + 2x + 1
A. (-1, -2) B. (2, 1) C. (1, 2) D. (-1, 0)