Hello, I need help figuring out how to solve 5 and 6. I know the answers are B for 5 and A for 6 I just don't know how my teacher got that.

5) Consider the feasible set, FS, shown below. Find the coordinates of the vertex B. 5) y x = 10 x + y = 20 FS X 2x + y =25 A) (0, 20) B) (5, 15) C) (10, 10) D) (10, 6) E) none of these 6) Find the slope of the line 3x - 2y + 12 = 0. 6) A ) N / W B) - W / N C) -2 D) 3 E) none of these