Answer:
No solution.
Step-by-step explanation:
So lets solve the square root.
Sqrt(y^2 - 20 + 100) = y - 10
Sqrt(y^2 + 80 = y - 10)
Solve time.
y^2 + 80 = y - 10 (We are squaring them)
y^2 + 80 = y^2 - 20y + 100
y^2 + 80 - y^2 = y^2 - 20y + 100 - y^2 (Subtract y^2 from both sides)
80 = -20y + 100
Flip it
-20y + 100 = 80
-20y + 100 - 100 = 80 - 100 (Subtract 100 from both sides)
-20y = -20
Now divide both sides by -20
-20y/-20 = -20/-20
y = 1
All you would do is plug in the values and you get...

This is false.
Answer:
19 sides
Step-by-step explanation:
Sum of angles of n-side polygon = 180 *(n - 2)
180 *(n -2) = 3060
Divide both sides by 180
n- 2 = 3060/180
n - 2 = 17
n = 17+2
n = 19
Answer:
10 i think i didnt really get your question though
42,786 divided by 12 = 3,565.5