Solve the system of equations using matrices. Use Gaussian elimination with back-substitution. -5x - y + 6z=-29 -8x - 9z=-99 2y + z= 7
A. {(-9, 2, 18)}
B. {(9, 2, 3)}
C. {(-9, 18, 2)}
D. {(9, 3, 2)}
Answer: B
Mathematics
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Use the shell method to find the volume of the solid generated by revolving the shaded region about the indicated line.About the line y = -1x = 
(solid)
A. 
?
B. 
?
C. 
?
D. 
?
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Find the limit.
A. 
B. 15
C. 5
D. 
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Find the average value of 
over the given region.
+ z2 over the cube in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 16 B. 48 C. 4 D. 32
Mathematics
Find the volume under the surface z = f(x,y) and above the rectangle with the given boundaries.z = 6x2y; R = {(x, y): 0 ? x ? 4, 0 ? y ? 3}
A. 576 B. 2256 C. 676 D. 1256
Mathematics