Where can the perpendicular bisectors of the sides of a right triangle intersect

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2