Posted by Mary jo on Tuesday, April 7, 2009 at 8:40pm.
Solve by the elimination method.
5r3s=2
3r 5s =42
r=40
is this right.
4x+5y=7
5x4y=5
Decide whteher the pair of line is parallel, perpindular, or n
I said is was parallel. Tell me if this right.

Math  Reiny, Tuesday, April 7, 2009 at 11:09pm
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  Latoya Harris, Thursday, February 23, 2012 at 11:54am
3(7r5)=48
can u help me solve this problem
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