Quick Homework Help

# tell whether the lines are parallel,perpendicular or neither  ⚑ Flag

by ROCKSIE002 at February 15, 2011

3x-6y=-12   18x+9y=-12

ergeagaecgregd

hackman February 15, 2011

what lines?

WolvesofJesonae February 15, 2011

you have to solve it to make it y= and it will be parallel if the slopes are the same and it'll be perpendicular if it's the reciprocal for the slope

loiujk February 15, 2011

find the slope by putting it  in y=mx+b form where m= slope so -6y=-3x-12 or y=1/2x+2 so slope for first one is 1/2 and then the equation of the second one is 9y=-18x-12 or y=-2x -4/3 so slope is -2. if slopes are equal then it is parallel if slopes are neg, recip. then it is perp. so lines are perpendicular

GURUKID February 15, 2011

your lines would be perpendicular because the slope of the second line is the opposite reciprical of the second.x=1/2 and x=-2

NoraYa February 15, 2011

Use this simple rule: Parallel lines have the same slopes and different y-intercepts.Perpendicular lines are a little tricky; if a line is perpendicular to another, the slope of the line is the negative reciprocal of the line it is perpendicular to.Ex: y = 3x is perpendicular to y = -1/3x

Gentou February 16, 2011