Answer:
3a+5
Step-by-step explanation:
add-4a and 7a
3a+14-9
subtract 9 from 14
3a+5
10. -8 1/2, -7.2, 47/9, 5 1/4, 6.75
I think it's 56y + 7, is what I'm pretty sure of.
We first find A2, for which we multiply A with itself. We perform matrix multiplication in which we multiply rows of first matrix with columns of second matrix element by element and add.