The odometer on Melody's car read
45,920 at the beginning of her trip and
46,460 at the end of her trip. Her speed
averaged 54 miles per hour, and she used
20 gallons of gasoline. How many miles
per gallon did she average?

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.