What are the coefficient(s) in the following expression?
5a + 6b - 7c

Which statement about perfect cubes is true

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge