Rashida owns a bike rental company. she charges an initial fee of $10 for each rental and an hourly rate of $4. if a costumer spends 58 dollars, how many did they rent the bike for ?

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?