In 2020, there are 45 car accidents and in 2021 the number of car accidents decreases by 12. Find the percent decrease.

What is the measure of angle x? answer

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.

Find the solution set for this equation: t^2+7t=0 separate the two values with a comma.