SOLUTION: decide whether the pair of lines is parallel, perpendicular, or neither. 5x + 4y = 8 4x - 5y = 4

Algebra ->  Parallelograms -> SOLUTION: decide whether the pair of lines is parallel, perpendicular, or neither. 5x + 4y = 8 4x - 5y = 4      Log On


   

Question 243622: decide whether the pair of lines is parallel, perpendicular, or neither.
5x + 4y = 8
4x - 5y = 4
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
5x + 4y = 8
4y=-5x+8
y=-5x/4+8/4
y=-5x/4+2
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4x - 5y = 4
-5y=-4x+4
y=-4x/-5+4/-5
y=4x/5-4/5
slopes are -5/4 & 4/5 therefore these lines are perpendicular.