15% of the people who went to the movies bought popcorn. if 180 people went to the movies, how many did not buy popcorn?

Can someone me do math because i am having a breakdown rn because i don’t get it

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?

Which is f(5) for the function –2x2 + 2x - 3?