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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

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  1. anonymous
    • 5 years ago
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    These two lines are not parallel.

  2. anonymous
    • 5 years ago
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    Oh wait. Yes they are.

  3. anonymous
    • 5 years ago
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    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
    • 5 years ago
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    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
    • 5 years ago
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    Yeah, or what he said.

  6. anonymous
    • 5 years ago
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    err. y=2x-9 is the second line. But still not the same line and are parallel therefore no solutions.

  7. anonymous
    • 5 years ago
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    lol you guys are funny and pretty good at math gracias (thanks)

  8. anonymous
    • 5 years ago
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    Do you see how I arrived at the equations for those lines?

  9. anonymous
    • 5 years ago
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    yes i am very much begining to understand :)

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