Point Y is located in the first quadrant and forms a line segment that is 4.5 units directly
vertical from point Z. What is the location of
point Y?

Which expression gives the area of the triangle shown below

Can any one me with the answers to these questions asap?

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