Nonagon - 9 sides
Sum of interior angle of a polygon is (n-2)180 = x
N is the number of sides, so when you plug in 1260 for x, you get 9 for n
Expanded: 3x^2 + 17x +10
Simply: it’s already simplified
The first equation will go up by 2.5 and if it were changed to y=3X+2 it will go up by 8
