What is the value of x?

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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.

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

What’s the volume of the triangular prism?