21x-9+63=180
21x+54=180
21x=126
x=6
You never actually asked a question but if you are asking the rate at which the football traveled then that would be traveling 1 foot down every 2.33333 seconds
Answer:
d
Step-by-step explanation:
You can remove the % sign if you divide the number by 100:

This is because % is defined as 1/100, and the name (per-cent) actually meant this originally!
we can also simplify it: let's divide it by 4:
I believe it is the last answer choice