Ricky needs 3 1/4 cups of sugar to make muffins. he already has 2 2/4 cups. how many more cups of sugar does he need? (12-9)

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field