Ys is the perpendicular bisector of xz. What is the length of Xs if xz is 18 inches long?

In the 30-60-90 triangle below side s has a length of and side r has a length

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left