Determine whether or not each set of side lengths would form a right triangle.

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

Need so much on this one how many yards?

Which of the following parabolas opens up?