Question

check my answers?

http://prntscr.com/9h4i38

Answer 1

http://prntscr.com/9h4ikp

Answer 2

Looks good to me :)

Answer 3

and how about the second link?

Answer 4

it's correct :)

Answer 5

http://prntscr.com/9h4k6a

Answer 6

correct! :)

Answer 7

http://prntscr.com/9h4kgh http://prntscr.com/9h4kmb im not sure about these two

Answer 8

For second one\[\huge{b_{ij}}\]where\[\huge{i~represents~as~matrix~row}\]\[\huge{j~represents~as~matrix~column}\]

Answer 9

ok

Answer 10

First screen shot, second question, you've only got one matrix selected, what is it being added to?

Answer 11

the 3 is being added to the 3 and the -1 is being added to the 0

Answer 12

2*