Coordinate geometry help! 2u math (1 Viewer)

[fatima96]

find the eqn of the line passing through the point of intersection of the lines 4x-2y+3=0 and x + 4y+ 6=0 and has a gradient of 2/3.
I tried 82178271937 times :|
cant get the answer

 

[unLimitieDx]

simultaneous equations, to find the point of intersection (x,y)

then use point gradient formule with (x,y) m=2/3
y-y1 = m(x-x1)
and that should give you the answer...

 

[Carrotsticks]

 

[kazemagic]

do simultaneous equation with those 2 equations. U get an "x" and "y" value, sub x,y and the gradient into y=mx+b(equation of a line)

 

[fatima96]

OMG thanks so so so so soosososoosososososososo much times infinity!
I SPENT 30 MINS DOING A1X +B1Y............BLERGHHHJ
THANKSSS!

 

[fatima96]

the answer is 12x-18y-5=0.
Thanks to all

 

[fatima96]

Another qn
Show that the points A(1,-1) and B(-3,5) are on opposite sides of the line 2x-y+8=0?

use perp distance formuale