What is the first step in solving 3=r/10

multiply both sides by ten

Step-by-step explanation:

eliminate the ten by doing the opposite (x10 is the opposite of /10). and then you get the answer 30=r

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