Answer:
c is the supplement angle
(72÷2)³ - 7 · 9 ÷ 9
First, parenthesis
72÷2 is 36
Next, exponents.
36³ is 46656.
Then, multiplication.
7 · 9= 63
After that, division.
63 ÷ 9 is 7
Finally, subtraction.
46656 - 7 is 46649
The formula of a midpoint SR:

We have
S(4, 1) and M(7, -5)
Substitute:

<h3>Answer: R(10, -11)</h3>