The first painter can finish a paint job in 2 hours. the second painter can finish the same job in 8 hours. how long would it take them to finish the job if they were working together?

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

fd

step-by-step explanation: