Maya is packing her backpack for a hike. In one pocket, she puts in a 1/2-pound bag of trail mix, a water bottle weighing 2 1/8pounds, and a flashlight weighing 1/4pound. How much weight do these three items add to her backpack? Show your work.

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?