maths
line A has equation y=4x-1
line b is perpendicular to line a and passes through the point (8,5)
work out the coordinates of the point where line B intersects the x-axis
line b is perpendicular to line a and passes through the point (8,5)
work out the coordinates of the point where line B intersects the x-axis
(edited 2 years ago)
at the x-axis, y=0.
line A has a gradient of 4? So line B has a gradient of -1/4
line B has the equation y=-1x/4+7 (or 4y=-x+28)
so substitute 0 for y: 4(0)=-x+28
x=28, so the coordinate is (28,0)
line A has a gradient of 4? So line B has a gradient of -1/4
line B has the equation y=-1x/4+7 (or 4y=-x+28)
so substitute 0 for y: 4(0)=-x+28
x=28, so the coordinate is (28,0)
(edited 2 years ago)
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