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Let A be a 5 x 5 matrix and B be a 3 x 5 matrix. a) is it possible yo add A and B? b) Is it possible to do the multiplication AB? c) Is it possible to do the multiplication BA?

Submitted: 266 days and 16 hours ago.

Category: Math

Value: $9

Status: CLOSED

Level: college; Subject: algebra

Accepted Answer

Hi again,

a) It is NOT possible to add A and B. The two matrices must have the same dimensions.

b) It is NOT possible to do the multiplication AB. Number of columns of the first matrix must be equal to the number of rows of the second matrix.

c) It is possible to do the multiplication BA. Number of columns of the first matrix is equal to the number of rows of the second matrix.

Accepts:
Expert:	abozer
Pos. Feedback:	99.9 %
Answered:	3/1/2009

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