(Solved) : Given Practice Test Linear Algebra Class Need Check Answers Correct Q33388811 . . .
We were given this practice test for our linear algebra classand I need to check if my answers are correct 
I. Determine the value(s) of k such that the linear system has a unique solution. (10 points) 10kx 6y +z- k II. Find x so that A is equal to its inverse. (10 points) 4-4 III. If det(A)- 3 and det(B) – -6, A and B are of order 5, find the value of the given expression. (15 points) det(3A) det(6B) – 7det(AB) – det(2A”)det(4B) IV. Evaluate the determinant of the given matrix by cofactor expansion along the second column. (15 points) 2 1 42 1 0-3 -2 1 0-4 0 V. Use an inverse matrix to solve of the given matrix using its adjoint. (15 points) A 2 4 3 0 1 -1 VII. A system composed of two industries, coal and steel has the following input requirements (a) To produce $1.00 worth of output, the coal industry requires $0.10 of its own product and $0.80 of steel (b) To produce $1.00 worth of output, the steel industry requires $0.10 of its own product and $0.20 of coal Find the Leontief Matrix for the system. Then solve for the output matrix X (production vector) where the external demand is 10,000 and 20,000 for coal and steel respectively. (15 points) Show transcribed image text
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Answer to Given Practice Test Linear Algebra Class Need Check Answers Correct Q33388811 . . .
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