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What is the point of contact of y = 3x + 4 and 8x - 4y = 16
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The co-ordinates of the point at which the lines y = 3x + 4 and 8x - 4y = 16 intersect satisfies both the equations.
Substituting y = 3x + 4 in 8x - 4y = 16
=> 8x - 4(3x + 4) = 16
=> 8x - 12x - 16 = 16
=> -4x = 32
=> x = -8
y = -20
The point of intersection of the lines is (-8, -20)
Posted by justaguide on September 23, 2013 at 2:54 AM (Answer #1)
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