SOLUTION: without graphing, determine whether the following pairs of lines are (a) parallel, (b) perpendicular, or (c) neither parallel or perpendicular: Express your answer in standard form

Question 486994: without graphing, determine whether the following pairs of lines are (a) parallel, (b) perpendicular, or (c) neither parallel or perpendicular: Express your answer in standard form.
5x - 6y = 19
6x + 5y = -30
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
For any system of the form

the two lines are perpendicular. In this case, the system you have fits this form (with a bit of simplification). So the two lines are perpendicular.
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