Explanation needed

12. [-/9 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part. Tutorial Exercise Evaluate the given expression. Take 1 -1 0 x 1w A = 0 9 -1 and C = zr 7 9AT - CT Step 1 Recall that if A is an m x n matrix, then its transpose is the n x m matrix obtained by writing its columns as rows, so the ith column of the original matrix becomes the ith row of the transpose. We denote the transpose of the matrix A by A . The expression 9A' - C' involves the transpose of the matrix A as well as the transpose of the matrix C, so our first step will be to determine each of these matrices. We are given matrix A. A = 1 0 9 Since matrix A is a 2 x 3 matrix , then its transpose A' will be a X matrix