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mitchelsewbaran
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If the 2 lines given by the equations 12x+3y=20 and ax+y=10 don't intersect when graphed, what is the value of "a"?
 2 years ago
 2 years ago
mitchelsewbaran Group Title
If the 2 lines given by the equations 12x+3y=20 and ax+y=10 don't intersect when graphed, what is the value of "a"?
 2 years ago
 2 years ago

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sasogeek Group TitleBest ResponseYou've already chosen the best response.1
if they don't intersect, it means they're parallel and their gradient is the same. find the gradient of the first equation and that's equal to "a" :)
 2 years ago

zzr0ck3r Group TitleBest ResponseYou've already chosen the best response.0
set both equal to y, and make them have the same slope
 2 years ago

zzr0ck3r Group TitleBest ResponseYou've already chosen the best response.0
as long as they dont have the same y intercept they will not cross if they have the same slope
 2 years ago

zzr0ck3r Group TitleBest ResponseYou've already chosen the best response.0
3y = 20 3x y = x(20/3) and the other equation set to y is what?
 2 years ago

zzr0ck3r Group TitleBest ResponseYou've already chosen the best response.0
@mitchelsewbaran ?
 2 years ago

mitchelsewbaran Group TitleBest ResponseYou've already chosen the best response.0
hmmm.....
 2 years ago

zzr0ck3r Group TitleBest ResponseYou've already chosen the best response.0
that should be +(20/3)
 2 years ago

zzr0ck3r Group TitleBest ResponseYou've already chosen the best response.0
y = x+(20/3)
 2 years ago

zzr0ck3r Group TitleBest ResponseYou've already chosen the best response.0
solve for y in the second equation
 2 years ago

zzr0ck3r Group TitleBest ResponseYou've already chosen the best response.0
y = ax+10 we want them to have the same slope so what does a need to be? y = x+(20/3) y = ax+10 a = ?
 2 years ago

mitchelsewbaran Group TitleBest ResponseYou've already chosen the best response.0
10?
 2 years ago

sasogeek Group TitleBest ResponseYou've already chosen the best response.1
12x+3y=20 solve for y 3y=12x+20 y=4x+(20/3) can u tell what the slope is?
 2 years ago

sasogeek Group TitleBest ResponseYou've already chosen the best response.1
@mitchelsewbaran ... ?
 2 years ago

mitchelsewbaran Group TitleBest ResponseYou've already chosen the best response.0
hold on
 2 years ago
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