Use the table to write a proportion. Concert 1
Concert 2
15
18
Songs
Hours
2.5
h
songs
songs
One proportion is
hours
h hours
10

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Three times the sum of a number and seven is negative thirty-six. what is the number?

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.