Answer:
(3,6)
Step-by-step explanation:
-(6x+2y=30)
x+2y=15
-6x-2y=-30
x +2y=15
-5x=-15
x=3
3+2y=15
2y=12
y=6
Slope=5/7
Slope=Δy/Δx=(3-(-2)) /(9-2)=5/7
82°