Question

helpppppp

Answer 1

for A + B just create a new 3x2 matrix and add the corresponding entries of A and B.

Answer 2

good

Answer 3

for 3A just create a new 3x2 matrix and multiply every entry in A by 3

Answer 4

make sure you are using the original matrix A not your A + B matrix

Answer 5

good that's it.