The next three problems are like the preceding three, except that you need to get all answers correct before WeBWorK will give you credit. This will be true for many problems in this class. The purpose of insisting on all answers being correct is to encourage you to think about the whole context of the problem rather than the individual pieces.
Let $a = 2.3, \quad b = 4.5, \quad c = 5.9.$ Then $a-b/c =$ and $(a-b)/c =$