What are the classifications for the triangles in problems 1 and 2?

Ineed with number 6 , explain how to get 1978

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

Which system of linear inequalities is represented by the graph?