R: (-inf, 0]
D: all real #'s

and surely you know how much that is.
Answer:
Step-by-step explanation:
The opposite of a number is found by taking the opposite sign of the one given. The opposite of 3 is -3; the opposite of -2 is 2.
Therefore, the opposite of -5.5 (point P) is 5.5 (point S).
Answer:what is this called
Step-by-step explanation: