Are the two lines #5x+4y=1# and #4x+5y=7# parallel, perpendicular or neither? Geometry Angles and Intersecting Lines Angles Between Intersecting and Parallel Lines 1 Answer Konstantinos Michailidis Nov 22, 2015 For line #5x+4y=1=>y=-5/4x+1/4# and for line #4x+5y=7=>y=-4/5x+7/5# because slope for the first is #-5/4# and for the second is #-4/5# they are neither parallel nor perpendicular. Answer link Related questions When given line #y=2x + 3# and point (4,2), how would you find a parallel and a perpendicular line? What is the relationship between two perpendicular lines? What are some examples? Consider the line #y=8x-2#. What is the equation of the line that is parallel to this line and... What is the equation of the line that is perpendicular to the line #3x + y = 7# and passes... What is the equation of a line that satisfies the given conditions: perpendicular to #y= -2x +... What is the equation of a line that satisfies the given conditions: perpendicular to #y= -2x +... What line is perpendicular to #y = -3# and passes through point (4, -6)? Perpendicular lines have _________ slopes? What is an equation of the line that has a y-intercept of -2 and is perpendicular to the line... What is the equation of the line in slope-intercept that is perpendicular to the line #4y - 2 =... See all questions in Angles Between Intersecting and Parallel Lines Impact of this question 3443 views around the world You can reuse this answer Creative Commons License