Find the area of this figure ( sides meet at right angles)

Which expression shows the sum of the polynomials with like terms grouped together

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

What is the value of x? enter your answer in the box.