What is an equivalent expression to 4(9 7) 36 7,13 11, 36 28, 13 7

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 value of x to the nearest tenth. a. 4.5 b. 5.4 c. 6.3 d. 7.2

There is a linear relationship between a salesperson sales and her weekly income. if her sales are $200 her income is $500 and if her sales are 1,200 her income is $600.what is the relationship between sales and income