Question: (1 point) If A and Bare 7 x 4 matrices, and O' is a 2 x 7 matrix, which of the following are defined? JA.

(1 point) If A and Bare 7 x 4 matrices, and
(1 point) If A and Bare 7 x 4 matrices, and O' is a 2 x 7 matrix, which of the following are defined? JA. CB OB. B + A JC. CT 7D. A- C DE. ABT OF. BC

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