Given:
Width of the building = 2y
Length of the building = 9y-4
Find-:
Area of building in terms of y.
Explanation-:
The area of a rectangle is:
[tex]A=\text{ Length}\times\text{ Width}[/tex]
So the area of the given building is:
[tex]A=2y\times(9y-4)[/tex]
Area is:
[tex]\begin{gathered} A=2y\times(9y-4) \\ \\ =2y(9y)-4(2y) \\ \\ =18y^2-8y \end{gathered}[/tex]
The expression of area is:
[tex]18y^2-8y[/tex]
