Answer: The expression for the perimeter of the triangle is 9x -4
Explanation:
Add the three given lengths.
(2x +1) + (3x) + (4x -5)
2x + 3x + 4x +1 -5
Combine like terms
9x - 4
That expression is the perimeter.
If we are given more information, it might be possible to solve for the value of x, and get a number, but the is as much as we can do here.