Karen has 4h storybooks. karen's storybook collection is 2/3 of what mary's collection is. how many storybooks do they have in all?

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

How can writing phrases as algebraic expressions you solve problems?

Tim earns $120 plus $30 for each lawn he mows.write an iniqualityvto represent how many lawns he needs to mow to make more than $310