In order to join a yoga class you pay a $100 annual fee then $5 for each class you go to. what is the average cost per class if you go to 20 classes

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points

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.

What is the circumference of the pie