Question

Please help with this

Answer 1

Answer: D) [-9  0  3]

These are two matrices (plural for matrix) we're adding here. The idea is to add up the corresponding elements. Since both are 1x3 matrices, addition is defined. 

Row1Column1: -6 + (-3) = -9
Row1Column2: -2+2 = 0
Row1Column3: 2+1 = 3

Answer 2

Add the numbers in the matrices in order.  -6 + -3 = -9; -2 + 2 = 0; 2 + 1 = 3.  So our solution matrix will have [-9, 0, 3], choice D from above.