Abook club charges a membership fee of $20 and then $12 for each book purchased. write a function to represent the change, y, of membership in the club based on the number of books purchased, x.

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?

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.