Keitaro buys a hat that is on sale for 15% off. he says that that total amount he will pay will be equal to 75% of the regular price of the hat. is he correct? write an expression to justify you answer.

In what form is the following linear equation written y=9x+2

The ratios of boys to girls on a soccer league is 2: 5. if there are 28 boys, how many girls are playing soccer? extra points! will mark as brainiest asap

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.