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3) the point A has coordinates (-3,2) and the point B has coordinates (7,k)

the line AB has equation 3x+5=1

a) i) show that k= -4

ii) hence find the coordinates of the midpoint AB

b) find the gradient of AB 

c) a line which passes through the point A is perpendicular to the AB. Find an equation of this line, giving your answer in the form px + qy + r = 0. Where p,q and r are intergers

d) the line AB, with equation 3x+5y=1 , intersects the line 5x + 8y = 4 at the point C. Find the coordinates of C

 Oct 11, 2018
 #1
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3) the point A has coordinates (-3,2) and the point B has coordinates (7,k)

the line AB has equation 3x+5=1

a) i) show that k= -4

ii) hence find the coordinates of the midpoint AB

b) find the gradient of AB 

c) a line which passes through the point A is perpendicular to the AB. Find an equation of this line, giving your answer in the form px + qy + r = 0. Where p,q and r are intergers

d) the line AB, with equation 3x+5y=1 , intersects the line 5x + 8y = 4 at the point C. Find the coordinates of C

laugh

 Oct 13, 2018

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