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anonymous
 4 years ago
how do i find out if these two lines are perpendicular? please show me how to work the problem:
4x+2y=12, x+2y=6
anonymous
 4 years ago
how do i find out if these two lines are perpendicular? please show me how to work the problem: 4x+2y=12, x+2y=6

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aroub
 4 years ago
Best ResponseYou've already chosen the best response.1Do you know how to find the slope ?

aroub
 4 years ago
Best ResponseYou've already chosen the best response.1Okay, great! What are the slopes?

aroub
 4 years ago
Best ResponseYou've already chosen the best response.1Fine I'll tell you how :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i get the y =mx+b? or is there another method that would make this easier?

aroub
 4 years ago
Best ResponseYou've already chosen the best response.1No you got it! y=mx+b where 'm' is the slope and 'b' is the yintercept.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0ok, then what do i do to the problem? first i get them in the correct format? and then?

aroub
 4 years ago
Best ResponseYou've already chosen the best response.1I'll do the first one and you do the second one. 4x+2y=12 As you said you return it to the form y=mx+b 2y=4x+12 y=2x+6 And right we said that y=mx+b where 'm' is the slope ? What do we have instead of m here ? 2 right ? For the first one the slope is 2. Get it ?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes, the second is y=1/2x+3, so then what

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.01/2, now how do i know if they are perpendicular?

aroub
 4 years ago
Best ResponseYou've already chosen the best response.1Correct, you know they are perpendicular when you multiply the slope together you get 1 1/2*2=1 So yes they are perpendicular.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so if they equal 1 when multiplied they are perp? then are they parallel if they slop is similar and the y intercept is different?

aroub
 4 years ago
Best ResponseYou've already chosen the best response.1Yes! Don't worry about the yintercept.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0why not worry about the y intercept?

aroub
 4 years ago
Best ResponseYou've already chosen the best response.1Because you won't use it to know if they are perpendicular or parallel.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so is a line parallel if it has the same slope always?
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