According to a recent survey 31% of residents of a certain state you're 25 years or older have a bachelors degree. A random sample of 50 residents of the state H 25 years or older will be selected let the random variable B represent the number in the sample who have a bachelors degree what is the probability that B will be exactly 20

Which statement best describes the polynomial

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3

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.