Wednesday
April 16, 2014

Homework Help: Calculus

Posted by Jake on Saturday, April 7, 2012 at 1:35pm.

which pair of lines are perpendicular?

a) 2x + 3y - 7=0, -3x - 2y + 2=0

b) 2x - 3y + 2=0, 5x - 7y + 2=0

c) -4x + y - 3=0, x + 4y=0

d) -5x + y + 1=0, 5x + y + 1=0


Please explain. I know we have to use the dot product :3

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