What function can be used to determine the cost of t-shirts from Timmy's T-shirts?

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?

9/10 divide by -3/15 as a mixed number

Solve the triangle. a = 21°, c = 105°, c = 5