Question

Match each matrix on the left to the dimensions of a Matrix on the right that can be added to it or subtracted from it. A. 4x2B. 2x2C. 3x2D. 2x4

Answer 1

lets remind ourselves about some rules of adding and substracting matrices

you can add or subtract:

2x3 with a 2x3 matrix

a 3x3 with a 3x3

You can NOT add a 2x3 with a 3x2or a 3x3

first pictures is a 2x4 matrix , 2 represents the number of columns, 4=rows

so 1=d, 2=b, 3=a, 4=c