For no solution, the two lines have to never intersect, which means they have to be parallel lines. In other words, no solution will satisfy both equation. For infinitely many solutions, the two lines have to overlap each other, which means one equation has to be a multiple of the other equations.
[joint] the site of the junction or union of two or more bones of the body; its primary function is to provide motion and flexibility to the frame of the body. Some are immovable, such as the sutures where segments of bone are fused together in the skull.
The skull is a bony structure in the head of most vertebrates (in particular, craniates) that supports the structures of the face and forms a protective cavity for the brain.The skull is composed of two parts: the cranium and the mandible.he English word skull is probably derived from Old Norse  skalli  meaning bald, while the Latin word cranium comes from the Greek root ÎºÏÎ±Î½Î¯Î¿Î½ (kranion). The skull is made of a number of fused flat bones.