Question

31) Calculate the length of the perpendicular from (7,0)
to the straight line 5x+12y-9=0 and show that it is
twice the length of the perpendicular from (2,1) ?​

Answer 1

Answer:

$distance \: = \frac{5(7) + 12(0) - 9}{ \sqrt{ {5}^{2} + {12}^{2} } } = \frac{35 - 9}{13} = \frac{26}{13} = 2$