There are 3 black shoes and 9 red shoes. The ratio is 3:9. What fraction of shoes are black?

3/12 or simplified is 1/4

Step-by-step explanation:

I think its right! sorry if im wrong

3/12

Step-by-step explanation:

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