The length of a rectangle is four units shorter than half the width. If the length of the Rectangle is 18 units, which equation can be used to find w, the width of the rectangle?

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

The slope of the line whose equation is y - 3 = 0 is 0 3 no slope