Beth wants to buy some walnuts and pecans to make a snack mix for a party. Walnuts cost $2.00 per pound and pecans cost $3.50 per pound. Write a system of inequalities and graph it to describe all the possible weight
combinations of the nuts Beth can buy while spending $21 or less. Use x to represent the number of pounds of
walnuts and y to represent the number of pounds of pecans.