Find the missing coordinate to complete the ordered pair. y = -x (10, )
(10, -10)
(10, 0)
(10, 10)
(-10, 10)

How to solve a simultaneous equation involved with fractions?

Ineed with number 6 , explain how to get 1978

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.