Shannon states that 7 5/8 − 5 1/3 = 2 4/5 because 7 − 5 = 2 , 5 − 1 = 4 , and 8 − 3 = 5 . First, state whether you agree or disagree. Then, explain briefly how to subtract mixed numbers with unlike denominators. Be sure to show your solution as a subtraction equation.

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?

How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid in order to get a 40% solution of acid?