on May 20th the Miller family received 19 pieces of mail consisting of letters bills adds and magazines. if they received five more magazines than bills, three more bills than ads, and the same number of letters as ads, how many letters did they receive?

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.