Given the set : {5, 8, 8, 10, 10, 11, 15, 17, 20), what is the probability of a choosing a number at random from the list and that number being 8?

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left