The student council sold a total of 220 brownies and cookies during a fundraiser. Each brownie sold for $0.75 and each cookie sold for $0.50. The student council made $136.50 from the sale of brownies and cookies. Find the number of brownies and cookies sold.

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.