## anonymous 5 years ago does the system have one solution, no solution, or an infinite number of solutions? 2x-y=5 -4x+2y=-18 a. infinite number b.one c. none

1. anonymous

These two lines are not parallel.

2. anonymous

Oh wait. Yes they are.

3. anonymous

Bleh. sorry. $y = 2x -5 \text{ is the first line}$ $y = 2x - 18 \text{ is the second line}$ They have the same slope (2) but are not the same line. Therefore they have no solutions.

4. anonymous

I don't think there's a solution... if you double the first equation and add it to the second, you get: -4x + 4x -2y + 2x = 10-18 And -8 is not 0...

5. anonymous

Yeah, or what he said.

6. anonymous

err. y=2x-9 is the second line. But still not the same line and are parallel therefore no solutions.

7. anonymous

lol you guys are funny and pretty good at math gracias (thanks)

8. anonymous

Do you see how I arrived at the equations for those lines?

9. anonymous

yes i am very much begining to understand :)