Monica has $20. She needs to buy a gallon of milk that costs $2.50. She also wants to buy yogurt, which costs $1.20 a cup. Which inequality can you use to find the number of cups of yogurt Monica can buy? 1.20x + 2.5 Greater-than-or-equal-to 20 1.20x + 2.5 Less-than-or-equal-to 20 1.20x + 2.5 20