2x - 4y = 10 2y+6=x

What is the best method to solve this system?

Equal values
Substitution
Elimination

What is the solution to the system?

someone please help asap

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Thee blue triangle has rotated from quadrant i to quadrant iii about the origin. describe the effects of the rotation on the coordinates of the blue triangle.

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .