Perform the indicated operation, whenever possible.Let A = 
and B = 
. Find A - B.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Evaluate the surface integral of G over the surface S.S is the parabolic cylinder y = 3x2, 0 ? x ? 4 and 0 ? z ? 4; G(x, y, z) = 3x
A. 
B. 
C. 
D. 
Mathematics
Find the focus and directrix of the parabola.y2 = -28x
A. F: (-7, 0); D: y = 7 B. F: (7, 0); D: x = -7 C. F: (-7, 0); D: x = 7 D. F: (0, -7); D: y = 7
Mathematics
Perform the indicated operation. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Evaluate.8x - 3y if x is equal to 6 and y is equal to 4
A. 36 B. 45 C. 60 D. 44
Mathematics