Im new to OP-AMPs I simulate a circuit using one op amp just to amplify the signal to the double this is my diagram ![enter image description here](https://i.stack.imgur.com/J1zP5.jpg) 

But im not sure if the Vs+ and the Vs- is useful in this case? I put the Vs+ to 5v and Vs- to GND and also remove it and it gave me the same result, did it matter if its or not connected?