A bag contains 9 red marbles,5 green marbles, and 6 purple marbles.
What are the odds of picking a red marble?

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the