Briana is 150cm tall. her friend julia is 10% taller than her. chelsea, briana's little sister, is 80% of briana's height. olivia, julia's little sister, is 21cm shorter than julia. how many cm shorter than olivia than chelsea.

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.

How do you determine if an ordered pair is a solution to a given equation?