Answered

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

Verified Answer :

linda99chen
By=2x-5
    -4y=8x-20
    y=-2x+5
    2x-5=-2x+5
        x=2.5
    2x2.5-5=0
    -2x2.5+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