DESPERATE! Please answer any of the questions :(( And explain bc im super confused

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

Are the corresponding angles congruent? explain why or why not.