D-10-2d+7=8-10-3d can someone solve this

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

The line containing the midpoints of the legs of right triangle abc where a(-5,5), b(1, 1), and c(3, 4) are the vertices.

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?