Ages w A man walked for 2 hours at 6 km/h.
He then cycled for a certain time at 16 km/h.
If he travelled 36 km altogether, for how
many hours did he cycle?​

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

to complete this square you have to rotate about the origin 270 degrees clockwise.