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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

Respuesta :

linda99chen
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)
nikato
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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