14-1!

Adding and Subtracting Matrices.

~A^t (transpose)= switching rows and columns.

~To add matrices they must have the same dimensions.(rows X columns)

~To add matrices you will add corresponding entries.

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Ex.1:

Find the dimensions of Z:

[234]

[125]

2X3

Ex.2:

Find the dimensions of H:

[0 9 -3 2]

[7 -4 8 6]

[11 2 3 0]

3X4

Ex.3:

Find A+B:

A= [2 8] B= [11 -3]

[5 6] [-5 15]

[13 5]

[0 21]

Ex.4:

Find X-Y:

X=[21 6] Y=[0 13]

[15 3] [-7 0]

[21 -7]

[22 3]