The area of a rectangle can be expressed as x²-x-12. The width of this rectangle can be expressed as x-4 . Determine the expression that can be used to represent the length of this rectangle.

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?