Michael has 27 keys, which is 3 times as many as Rachel. Rachel has 8 more keys than Ann. How many keys does Ann have?

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c =