SOLUTION: how can you tell if this pair of equations are parallel, perpendicular, or neither? y=(-5/2)x+11 and -5x+2y=20

Algebra ->  Graphs -> SOLUTION: how can you tell if this pair of equations are parallel, perpendicular, or neither? y=(-5/2)x+11 and -5x+2y=20       Log On


   

Question 817384: how can you tell if this pair of equations are parallel, perpendicular, or neither? y=(-5/2)x+11 and -5x+2y=20
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

how can you tell if this pair of equations are parallel, perpendicular, or neither?

put them both in standard slope-intercept form for an equation of a line 

y = mx + b  where m is the slope and b the y-intercept. 

 y=green%28-5%2F2%29x%2B11  m = -5/2

-5x+2y=20  0r  y+=+green%285%2F2%29x+%2B+10  m = 5/2

NEITHER parallel(slopes are not the same) 0r perpendicular (slopes are not negative reciprocals)