Can someone help : (3x+0*3x/y9)

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

Aiden buys two bags of chips at $1.09 each and a 20 ounce soda for $1.20 at the gas station.he knows that the state tax is 5.5. how much change will he receive from a $5 bill?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?