Find the vertex, focus, and directrix of the parabola. Graph the parabola.y2 - 12y + 8x + 84 = 0
A. vertex: (-6, 6)
focus: (-4, 6)
directrix: x = -8
B. vertex: (6, -6)
focus: (6, -4)
directrix: y = -8
C. vertex: (-6, 6)
focus: (-8, 6)
directrix: x = -4
D. vertex: (6, -6)
focus: (6, -8)
directrix: y = -4
Answer: C
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and the planes 
and 
A. 576? B. 96? C. 144? D. 24?
Use the rational zero theorem, Descartes's rule of signs, and the theorem on bounds as aids in finding all real and imaginary roots to the equation.3x4 - 20x3 + 44x2 - 80x + 128 = 0
A. 
, 4, -2i, 2i
B. 
, 4, -4i, 4i
C. 
, 4, -i, i
D. - 
, -4, -2i, 2i
Write the augmented matrix for the system.-2x + 4z = 34 2y + 6z = 62 7x + 5y + 8z = 99
A. 
B. 
C. 
D. 
Find the measures of the indicated sides, angles, or diagonals of the given parallelogram.Find m ?W, m ?Y, m ?Z. 
A. m ?W = 47° m ?Y = 133° m ?Z = 47° B. m ?W = 133° m ?Y = 47° m ?Z = 133° C. m ?W = 47° m ?Y = 47° m ?Z = 133° D. m ?W = 133° m ?Y = 47° m ?Z = 47°