What is the shape of the dark grey area representing the intersection of the plane and the sphere

What is the solution of the systems of equations? y=2/3x+3 x=-2

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .