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31 August, 02:59

How many solutions does this linear system have?

y=2x-5

-8x-4y=-20

A. One solution (-2.5,0)

B. One Solution (2.5,0)

C. No Solution

D. Infinite Number of Solutions

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Answers (2)
  1. 31 August, 03:38
    0
    B. y=2x-5

    -4y=8x-20

    y=-2x+5

    2x-5=-2x+5

    x=2.5

    2x*2.5-5=0

    -2x*2.5+5=0

    so (2.5,0)
  2. 31 August, 05:47
    0
    You can simplify the second equation by divining both sides by 4

    Which gives you - 2x - y = - 5

    Rearrange the terms and it'll give you y=-2x+5
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