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 3850 views around the world You can reuse this answer Creative Commons License