Find the magnitude of the vector v.
v = 
A. -22
B. 22
C. 
D. 
E. 
Answer: E
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Provide an appropriate response.Perpendicular lines form __________ angles.
Fill in the blank(s) with the appropriate word(s).
Give the degree measure of ?.? = cot-1 
A. 30° B. -30° C. 60° D. 45°
Solve the problem.Trains S and T are both traveling in the same direction. Their distances in miles North of Dallas after x hours are computed by the functions fS and fT, respectively, and their graphs are shown in the figure for 
(i) Which train is traveling slower? (ii) How many hours elapse before the two trains are the same distance from Dallas and how far are they from Dallas when this occurs? 
A. train S; 297 hours, 3.3 miles B. train S; 3.3 hours, 297 miles C. train T; 297 hours, 3.3 miles D. train T; 3.3 hours, 297 miles
Solve the system using a graphing calculator capable of performing row operations. Give solutions with values correct to the nearest thousandth.
x - 0.9y + z = -8
x - y + 2z = 
6.2x + 16y - 5z = 
A. {(4.729, 7.426, 3.652)} B. {(3.628, 5.029, 3.719)} C. {(-4.259, 3.107, 2.517)} D. {(-5.072, 3.306, 3.760)}