1. What is the sum of 9/12 + 4/12?

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.