Two old ladies left from A to B and from B to A at dawn heading towards one another (along the same road). They met at noon, but did not stop, and each of them carried on walking with the same speed. The first lady came (to B) at 4 p. m., and the second (to A) at 9 p. m. What time was the dawn that day?

w'x is 0.

hope it

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

-1   1/6.   you dont subtract the denominators

step-by-step explanation: