Solve by the elimination method.

Question

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.

Answer 1

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?

Answer 2

-3(7r-5)=-48

can u help me solve this problem