Which expression is equivalent to 19 -27

The answer is c because 19-27 is equal to 19+(-27)
To figure this out use keep change change
Keep the original sign of the first # (19) then make the sign it’s opposite (- =+) then change the sign of the next # (27= -27)

C! Because when you add as negative it is the same thing as just subtracting!

For range i think it’s area