SOLUTION: y = 3x +7 and x + 2y = -10 a.Are the lines perpendicular? Explain why by comparing the slopes of the lines. I just want a guide on how to begin to solve, I dont want the answer

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations -> SOLUTION: y = 3x +7 and x + 2y = -10 a.Are the lines perpendicular? Explain why by comparing the slopes of the lines. I just want a guide on how to begin to solve, I dont want the answer      Log On

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Question 284343: y = 3x +7 and x + 2y = -10
a.Are the lines perpendicular? Explain why by comparing the slopes of the lines.
I just want a guide on how to begin to solve, I dont want the answer.
Answer by richwmiller(9135) About Me  (Show Source):
You can put this solution on YOUR website!
These equations are in standard form ax+by=c not slope intercept form y=mx+b
In this form the slope is -a/b
the slope of the first is -3/7
the second -1/2
if they were parallel they would be the same
if they are perpendicular the product of the two slopes would be -1
they are neither.