Algebra

5) How many solutions does the system of equations have?x-4y=12 and 5x-20y=60
A.one
B.two
C.infinitely many
D.none
6) How many solutions does the system of equations have? y-6x=-3 and 4y-24x=-16
A.one
B.two
C.infinitely many
D.none

asked by Victoria
  1. 5) Multiply first equation by 5.

    5x - 20y = 60

    6) Multiply first equation by 4.

    4y - 24x = -12

    Subtracting first equation from the second, what does that tell you?

    posted by PsyDAG
  2. what is the answer for 5 and 6
    A.one
    B.two
    C.infinitely many
    D. none

    posted by Victoria
  3. I need help can someone help me.

    posted by Victoria
  4. come on. For #5, you have

    5x-20y=60
    5x-20y=60
    They are the same equation. So, any solution to one is also a solution to the other.

    Try a similar comparison for #6 and just think about what it means.

    posted by Steve
  5. thank you so much. thanks

    posted by Victoria

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