The number of carrots, c, is four less than half the number of peas, p. Which expression represents the number of carrots in terms of the number of peas?

If it says half of the number of peas then you would have to divided the number of peas by 2 p:2 and then you would have to take away 4 because it said four less than half the number - 4 and the expression would be p : 2 - 4