The arithmetic mean of x and y is 10 and their geometric mean is 8. What is the value of x and y?

This is about circle theorems. someone asap : (

Y=21.95x+10 y=22.45x solve by substitution

Julia bought 7 hats a week later half of all her hats were destroyed in a fire. there are now only 12 hats left with how many did she start