Find the angle between the given vectors to the nearest tenth of a degree.u = 
i + 
j, v = 
i + 
j
A. 240°
B. 150°
C. 210°
D. 120°
Answer: B
Mathematics
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Express the sum using summation notation. Use a lower limit of summation not necessarily 1 and k for the index of summation.
+ 
+ 
+ 
+ . . . + 
A. 
B. 
C. 
D. 
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Graph the solution set of the system of linear inequalities and label the vertices (if any) of the solution set.
A. 
B. 
C. 
D. 
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Perform the indicated operations.(-6x4 + 9x6 - 9 + 5x5) - (-1 - 9x5 + 6x6 + 3x4)
A. 15x6 - 4x5 - 3x4 - 8 B. 15x6 - 4x5 - 3x4 - 10 C. 3x6 + 14x5 - 9x4 - 8 D. 3x6 - 4x5 - 3x4 - 10
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Graph the numbers on the real number line.x ? 2
A. 
B. 
C. 
D. 
Mathematics