Can someone help me multiply this binomial?
Expand.
Your answer should be a polynomial in standard form.
(x-7)(x-3)

Identify the graph of y = ln x + 1.

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.

Ineed the question and choices are in the