You need at least 5 pounds of potatoes and onions. Potatoes cost $4 per pound and onions $2. You can spend at the most $18.
A. Define the variables
B. Write a system of liner inequalities that represent this situation
C. Graph the system of liner inequalities
D. Is it possible to buy 5 pounds of potatoes and 2 pounds of onions in the situation? Justify your answer