5x^2-456=-80x-1 for completing square with intermediate step in the form of (x+a)^2

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

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?