-2x+8y=9 and x-4y=21 is it parallel, perpendicular, neither

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

Read the equations in the table below. then drag a description of the situation and a table to represent each equation. indicate whether each of the relationships is proportional or non-proportional.

How do you solving the solution of each system using elimination?