Simba travel agency arranges trips for climbing mount kilimanjaro. for each trip they charge an initial fee of $100 in addition to a constant fee each vertical meter climbed. for instance, the price for climbing to the shira volcanic cone, which is 3000 meters above the base of the mountain is $400. let f represent the fee (in dollars) of the trip where they climbed d vertical meters

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.