Problem-9 Given a 4 x 3 matrix, A, and the linear system, Ax=b that has a unique solution, answer the following: (a) If possible, find the RREF of A. Otherwise describe what can be said about the RREF of A from the given information. (b) If c is another 4-vector, what are the possible numbers of solutions to the linear system Ax = c?

Q: Consider the following system of equations x+3y=2 3x+cy = 6.

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Q: If A is a 9 x 9 matrix and det(A) = 2, compute det(-A).

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