Question

When adding 8pi + pi does it equal 9pi or 8 pi

Answer 1

The answer is 9pi, because pi+pi=2pi and when u add it will get 10pi but u subtract it by one
hope this helps!!

Answer 2

I believe it is 9pi because it is addition so it would be like this: pi + pi + pi + pi + pi + pi + pi + pi + pi= 9pi