What are the side of triangle PQR

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?

What point is the projection of q on a) r b) s c) t

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.