What does row mean in math terms?

Answer 1

In linear algebra, a row is the horizontal portion of a matrix. For instance:

1 2 5 3

0 2 4 1

8 8 9 4

In that example, row1 = {1, 2, 5, 3}, row2 = {0, 2, 4, 1}, and row3 = {8, 8, 9, 4}