4.0.PJ-13 Design An art class is making a mural for their school which has a triangle drawn in the middle. The length of the bottom of the triangle is x. Another side is 2 more than three times the length of the bottom of the triangle. The last side is 13 more than the bottom of the triangle. Write and simplify an expression for the perimeter of the triangle'. What is the expression for the perimeter of the triangle?