Katie has 2 red pens, 5 blue pens, 3 green pens, and 6 orange pens in her backpack. if katie randomly selects 1 pen, what is the probability she will select 1 green pen?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.