The viewing window of a certain calculator is the shape of a rectangle
a) let w represent the width of the viewing window in centimeters. if the window is 5 centimeters longer than it is wide, write an expression in terms of w for the length of the viewing window
b) write a symbolic rule that represents the perimeter, p, of the viewing window in terms of w
c) if the perimeter of the viewing window is 26 centimeters, determine the dimensions of the window