A lecture was attended by 95 people in the university auditorium. Eleven of them were students who had volunteered to manage the event and the rest
were senior professors. What equation can be used to find how many senior
professors attended the lecture?

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

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.