If you run on a treadmill for 27 minutes 39 seconds at 6mph how many miles will you run?

The appalachian trail is a hiking trail that passes through the appalachian mountains. three members of a teen hiking group hiked a section of the trail. the hikers stopped at a rest area and equally shared 3 4 gallon of water. how much water did each person get?

Which speed is the fastest (use 1 mile ≈ 1.6 kilometers)? a. 12 miles/hour b. 18 feet/second c. 19 kilometers/hour d. cannot be determined

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?