The cafeteria is getting ready to serve lunch. They will serve a minimum of
250 lunches. There are two choices for lunch - a hamburger or a
piece of pizza. The hamburger will cost you $3.00 and the pizza will
cost $1.50. The cafeteria has a budget of at most $900 for lunch.
The information can be modeled with a system of inequalities. When
x is the number of Hamburgers sold, and y is the number of pizzas
sold, two of the inequalities that model the situation are x 20 and y z
0.