Well I'm new in this country and as a parent overwhelmed. Please help me out with that. I can help with German

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?

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315