Inverting or non inverting?

Determine the output voltage from the following circuit diagram?

which OpAmp circuit uses the following formula to calculate Gain? $$A_v=-\frac{R_f}{R_{in}}$$

which OpAmp circuit uses the following formula to calculate Gain? $$A_v=1+\frac{R_f}{R_{in}}$$

If V_out is positive which statement below is correct?

What type of circuit is shown here?

What is the gain the of Op-Amp configuration shown if R1= R2 = 100K ohm and Rf=200K Ohm?

What is the name of the Op-Amp configuration shown ?

What is the output voltage equation of the Op-Amp configuration shown if all resistors are equal ?