Is the pair of vectors 
and 
perpendicular?
?
A. no
B. yes
Answer: A
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Solve the problem.Find the slope of the tangent to the curve of the intersection of the cylinder 
and the plane y = -9 at the point 
A. 2
B. - 
C. 
D. 0
Simplify the rational expression. If the rational expression cannot be simplified, so state.
A. cannot be simplified
B. 
C. x - 10
D. 
Find the vertex, focus, and directrix of the parabola with the given equation.(x + 4)2 = -4(y + 1)
A. vertex: (-4, -1) focus: (-4, -2) directrix: y = 0 B. vertex: (-1, -4) focus: (-1, -5) directrix: y = -3 C. vertex: (-4, -1) focus: (-4, 0) directrix: x = -2 D. vertex: (4, 1) focus: (4, 0) directrix: y = 2
Solve the system by the addition method.
A. {(2, 1), (2, -1), (-2, 1), (-2, -1)} B. {(2, 1), (-2, -1)} C. {(1, 2), (-1, 2), (1, -2), (-1, -2)} D. {(-1, 2), (1, -2)}