Determine which of these illustrates two quantities that combine to make 0. A) Bill lost ten pounds and then gained ten pounds.
B) A business's profit if its income is less than its expenses.
C) A business's loss its income is expenses are more than its income.
D) It is ten degrees below zero and then the temperature rises fifteen degrees.

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.