Answer:
What YOUR PROBLEM
Step-by-step explanation:
Radius is half of the diameter so it's 7 for the diameter.
Step-by-step explanation:
The reason is because it is not just 6 it is - 6 so when there are two negative numbers they don't subtract they add if it was 6n then it was to be subtracted
21m - 11n + 2m
23m - 11n