Respuesta :
Answer: The required expression of area is 12x.
Step-by-step explanation: Given that a rectangular window has a length of 12 ft and a width of x ft.
We are to find the expression that represents the area of the window.
We know that
if the length and width of a rectangle are represented by l and w, then the area of the rectangle is given by
[tex]A=lw.[/tex]
For the given rectangular window, we have
[tex]l=12,\\\\w=x.[/tex]
Therefore, the area of the window is given by
[tex]A=lw=12\times x=12x.[/tex]
Thus, the required expression of area is 12x.