The mean is 726!!!!!!!!!!!!!!
Alright, so first we'll have to get y on the other side
So
2x+y=-9
-y -y
+9 +9
2x+9=-y
Then divide is all by -1 so y is positive
-2x-9=y
Answer:
B
Step-by-step explanation:
The answer is B I have seen this question befor
Bsbsvsvsvsvsvsvvzvzvzvzvzvz
The answer is 6*square rooted*2