Knowing the interior angle sum formula is;
180x(n-2)
180x(n-2)=1260 (solve for n here)
180n-360=1260
180n=1260+360
180n=1620
n=1620/180
n=9
Therefore, this polygon has 9 sides.
Hope I helped :)
You can multiply everything by 7 to make things simpler.
3x + 5 = 4
3x = -1
x = -1/3
Answer:
Step-by-step explanation:
5.55
