Use Cramer's rule to solve the system. 3x + 5y - 2w = -13 2x + 7z - w = -1 4y + 3z + 3w = 1 -x + 2y + 4z = -5
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Calculate the circulation of the field F around the closed curve C.F = - 
x2yi - 
xy2j; curve C is r(t) = 4 cos ti + 4 sin tj, 0 ? t ? 2?
A. 0 B. - 4 C. - 1 D. - 2
Mathematics
Find an equation of the line.
A. y = - 
x + 6
B. y = -3x + 6
C. y = -3x
D. y = 6
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics
For the given vectors u and v, find the angle between them.u = 
, v = 
A. 66° B. 90° C. 35.3° D. 0°
Mathematics