5-9(-5)=
with strategy i need to know how to get the answer

50

Step-by-step explanation:

Simplify the expression.

hope this helps

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