Answer:
y equals 4 because if you substitute solve and isolate you get that answer.
Answer:
y=x-1
Step-by-step explanation:
To find the sum of the interior angles of a nonagon, divide it up into triangles... There are seven triangles... Because the sum of the angles of each triangle is 180 degrees... We get
7 * 180 = 1260°
So, the sum of the interior angles of a nonagon is 1260 degrees.