Please help I will vote Brainiest hurry!! Ignore that they r already answered I can't get rid of them and they r probably wrong so please help???

A80-foot piece of siding is cut into three pieces so that the second piece is four times four times as long as the first piece and the third piece is five times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces.

Y=4x^2+x-1 solve using quadratic formula

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m