Find A-1, if it exists.A = 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = 8i - 4j, w = 2i - 6j
A. 35.7° B. 104.5° C. 92.0° D. 45.0°
Mathematics
Solve. Then graph. Write the solution set using both set-builder notation and interval notation.
< 6 
A. {b
b > -18}, (-18, ?)
B. {b
b ? -18}, [-18, ?)
C. {b
b ? -18}, (-?, -18]
D. {b
b < -18}, (-?, -18)
Mathematics
Find an equation of the line containing the given pair of points(9, 4) and (-5, 1)
A. y = - 
x - 
B. y = 
x - 
C. y = 
x + 
D. y = - 
x + 
Mathematics
Determine if the given value is a solution to the equation.w2 + 18w + 81 = (-w - 9)2; w = -3
A. Yes B. No
Mathematics