Why should inequalities with absolute value be set up differently to solve if it is an ""and"" situation vs. an ""or"" situation?

2nd one in the first row is correct

i think the amount would be $140.62

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