Hello there!
The correct answer is option C
3x + 20x - 55 = -9
I am not sure if you wanted some more details but I hope this helps and if you do, just let me and I will edit it.
Good luck with your studies!
Happy New Year!~
Answer:
3
Step-by-step explanation:
3(1)-2= 1
2(1)+1 = 3
I hope you can understand my work.
Since, the coordinates of the midpoint of line RS are M
.
The coordinates of endpoint R are (-2,10)
We have to determine the coordinates of endpoint S.
The midpoint of the line segment joining the points
and
is given by the formula
.
Here, The endpoint R is (-2,10) So, 
Let the endpoint S be 
The midpoint coordinate M is
.
So, 


Now, 


So, the other endpoint S is (8,0).