For the given vectors u and v, find the angle between them.u = 
, v = 
A. 66°
B. 90°
C. 35.3°
D. 0°
Answer: C
Mathematics
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Divide.1
÷ 1
A. 1
B. 1
C. 2
D. 1
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
? 
A. -20x B. 20x C. -1x D. 9x
Mathematics
Match the following reasons to complete the proof. Reasons may be used more than once.
Mathematics
Multiply or divide as indicated and reduce to lowest terms.
÷ 
A. 
B. 
C. 
D. 
Mathematics