Student Council is selling t-shirts and hats for $15 and $12, respectively. The club needs to raise at least $1980. They have received pre-sale orders of 80 t-shirts and 20 hats. Graph a system of linear inequalities that shows the number of t-shirts and hats they must sell in order to reach their goal. Use x for the number of t-shirts and y for the number of hats.
