22) Solve the problem.
The amount of gas that a helicopter uses is directly proportional to the number of hours
spent flying. The helicopter flies for 3 hours and uses 21 gallons of fuel. Find the number of
gallons of fuel that the helicopter uses to fly for 5 hours.

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.