What is the mean of the values in the dot plot?

a number line ranging from 30 to 40 with two dots over 30, two dots over 32, one dot over 34, and three dots over 38. giving brainliest too first to answer or the nicest

Consider 6x2 + 6x + 1. which term immediately tells you that this expression is not a perfect square trinomial? justify your answer

The measure of angle 0 is 600 degrees

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.