Find the magnitude and direction angle of the vector v. Round the direction angle to the nearest tenth of a degree when necessary.v = -2i + 7j
A. 
, 74.1°
B. 9, 285.9°
C. 
, 105.9°
D. 53, 105.9°
Answer: C
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Solve the problem.Find a unit vector perpendicular to plane PQR determined by the points P(2, 1, 3), Q(1, 1, 2) and R(2, 2, 1).
A. 
(i - 2j - 2k)
B. 
(i - 2j - k)
C. 
(i - 2j + k)
D. 
(-i - 2j - k)
Use the figure below to answer the following question(s).
In which graph does each vertex have the same degree?
A. Graph 1 B. Graph 3 C. Graph 4 D. Graph 2 E. none of these
Give an appropriate answer.Using the following graph, find an Euler path that starts with vertex E.
A. No Euler path exists. B. E ? D ? A ? B ? C ? A ? F C. E ? D? A ? C ? B ? A ? F ? E ? B D. E ? F? A ? B ? C ? A ? D ? E
Simplify.If P(x) = -9x + 2 and Q(x) = 3x2 + 6x + 6, find P(x) - Q(x).
A. -3x2 - 15x + 4 B. 3x2 - 15x - 4 C. -3x2 + 15x - 4 D. -3x2 - 15x - 4