I need help solving this problem

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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 of the following transformations will always produce a congruent figure?