Sue pays $38 per hour for dance class. The equation y = 38x relates the cost of dance class (y) to the number of hours (x) of class Identify the unit rate in the equation
A)
Х
B)
у
38
D)
38x

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

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.

Can random samples and proportional reasoning be used to determine precise information about a population? explain