Math

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Solve by the elimination method.
5r-3s=2
3r 5s =42
r=-40
is this right.

4x+5y=7
5x-4y=5
Decide whteher the pair of line is parallel, perpindular, or n
I said is was parallel. Tell me if this right.

  • Math -

    in your first question, you found only the one variable, you still have to find s
    Besides that, you have a typo in the second equation.

    in your second problem,
    the slope of the first equation is -4/5
    the slope of the second one is 5/4

    notice they are negative reciprocals of each other.
    What did you learn about that situation?

  • Math -

    -3(7r-5)=-48

    can u help me solve this problem

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