Answer:
it's pretty hard right now for ne
The gradient of the perpendicular line would be the negative reciprocal of the original line. Therefore the gradient of the perpendicular line would be -2/5x.
Since we know y=mx+c, ∴y=-2/5x+c. Sub in the x and y values of the given point and we get that c=26/5.
The perpendicular equation would be y=-2/5x+26/5.
I hope I got this right.
It is 5 because you have to do 12 squared minus 13 squared and then square root that which equals 5
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Add 25 and 6.25 then divide by 1.25 and it should give you n
