Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Answer: D
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Evaluate the surface integral of G over the surface S.S is the dome z = 5 - 2x2 - 2y2, z ? 0; G(x, y, z) = 
A. 50
B. 5?
C. 
?
D. 50?
Solve the problem.Tim and Judy mix two kinds of feed for pedigreed dogs. They wish to make 25 pounds of feed worth $0.25 per pound by mixing one kind worth $0.15 per pound with another worth $0.31 per pound. How many pounds of the cheaper kind should they use in the mix? Round your answer to the nearest pound, if necessary.
A. 16 pounds B. 9 pounds C. 11 pounds D. 21 pounds
Graph the linear equation. Give the x- and y-intercepts.y - 7x = 0
A. x-intercept: (0, 0); y-intercept: (0, 0)
B. x-intercept: (0, 0); y-intercept: (0, 0)
C. x-intercept: (0, 0); y-intercept: (0, 0)
D. x-intercept: (0, 0); y-intercept: (0, 0)
Find the value of the determinant.
A. -132 B. -92 C. 92 D. -32