Solve pls brainliest

Step-by-step explanation:

a))) -31-71=-102

b)-9+14=+5

Hi there!  

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I believe your answer is:  

A. - 31 - 71 = - 102

B. - 9 + 14 = 5

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Here’s why:  

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A. The minuend, subtrahend, and difference are parts of a subtraction problem. In the subtraction problem, - 31 - 71 = - 102, the number - 31 is the minuend, the number 71 is the subtrahend and the number - 102 is the difference.

B. When you are adding a negative number to a positive number you are effectively subtracting the second number from the first. ... And then you add the negative number, which means you are moving to the left – in the negative direction.

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Hope this helps you. I apologize if it’s incorrect.  

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