Keenan was climbing a cliff. he stopped for a snack. after that, he slipped 15 feet to an earlier foothold then slipped 1 foot to another foothold. model the distance keenan traveled after his snack as a sum

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?