Can you please help me with this?
Find the coordinates of the vertices formed by the system of inequalities.
x + y ≤ 9
x - 2y ≤ 12
3y ≤ 2x + 3
A. (-6, -9), (10, -1), (2, 7)
B. (-9,- 6), (-1, 10), (7, 2)
C. (-30, -21), (-6, -9), (6, 15)
D. (-6, -9), (6, -3), (-12, -21)
