Help is needed thanks :)

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?

Select the sequences that are geometric.

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)