Area of wall = 9 * 12 = 108 ft^2
Width of TV = x
Lenght = 2x
Diagonal of TV = 72 " = 6 ft
x^2+(2x)^2=6^2
x^2+4x^2=36
5x^2=35
x^2=36/5
x=sqrt(36/5)
Width = 2.68 ft.
Length = 2.68 * 5.36 = 14.36 ft^2
Area of wall - area of tv = 108 - 14.36 = 93.64 ft
That expression is written like so:
(5 + d)/(12 - w)
3x-10>4+7x-3
3x-10>1+7x
-4x-10>1
-4x>11
x<-11/4
Hope Your Thanksgiving Goes Well, Here's A Turkey
-TheKoolKid1O1