Please give me a formula and a step-by-step answer!

Ineed someone to me answer my question i have to have this done and knocked out

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

The table below lists recommended amounts of food to order for 10 party guests. how much of each food item should nathan and amanda order for a graduation party with 55 guests? use the table to answer. item amount fried chicken 16 pieces lasagna 7 pounds deli meats 1.8 pounds sliced cheese 1 and two fifths pounds bakery buns 1 dozen potato salad 2 pounds