Evaluate the expression. 7 + (- 12)

your answer is -5, i believe

First of all u must multiply the signs

As it is know that (-) *(+)= (-)

7-12= - 5

Answer is (- 5 )

sign minus because 12 > 5

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