OK I NEED HELP PLEASE
what is the center of (x-2)^2+y^2=16

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

How many four digit even numbers can be formed from digits 1,2,3,4,5 if repetition is allowed. how can solve this using permutation formula