When does f (x) = 2/x-1, equal -4?

How do i do this using elimination 2x+3y=12 x-y=6

Simplify the expression. -2/5(10+15m-20n)

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv