Find the magnitude and direction angle (to the nearest tenth) for each vector. Give the measure of the direction angle as an angle in [0,360°].
A. 20; 315°
B. 10; 135°
C. 10
; 45°
D. 10; 315°
Answer: D
Mathematics
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Provide an appropriate response.Given ? > 0, find an interval I = (5 - ?, 5), ? > 0, such that if x lies in I, then 
< ?. What limit is being verified and what is its value?
A. 
= 0
B. 
= 0
C. 
= 0
D. 
= 5
Mathematics
Solve by the method of your choice. Identify whether the system has no solution or infinitely many solutions, using set notation to express the solution set.4x + y = 11y = 12 - 4x
A. {(x, y) 
}
B. ?
C. {(5, -9)}
D. {(0, 11)}
Mathematics
Find the derivative of the function by using the definition.y = 5x2 + 2
A. 10x B. 10x + 2 C. 10x2 + 2 D. 5x
Mathematics
Determine if the matrix is in row-echelon form.
A. No B. Yes
Mathematics