The Randolph family has a 100-acre farm where the family raises two crops, x and y. The Randolphs take part in a government grant program which requires them to plant at least 20 acres of each crop. It costs the Randolphs $20 per acre to raise crop x and $40 per acre to raise crop y. The family has $2,600 to cover costs. Which system of inequalities represensts these constraints?