Find the difference.

(−x2+9xy)−(x2+6xy−8y2)

Consider the line y = -3/-2 x +6. find the equation of the line that is perpendicular to this line and passes through the point (-9,-3). find the equation of the line that is parallel to this line and passes through the point (-9,-3).

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Ahigh school has 3636 players on the football team. the summary of the players' weights is given in the box plot. approximately, what is the percentage of players weighing less than or equal to 225225 pounds?