Which ordered pair (a, b) is the solution to the given system of linear equations? 3a+b= 10 -4a-2b=2 (1,7)
(3, 1)
(11, -23)
(23, -11)​

The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?