Question

In a particular redox reaction, MnO2 is oxidized to MnO4– and Ag is reduced to Ag. Complete and balance the equation for this reaction in acidic solution. Phases are optional.

Answer 1

Mn02 + 2H20 + --> Mn04- + 4H+ +4e-
Ag+ + e- --> Ag

I assume you meant Ag+
These are the half equations written out for you. By balancing the electrons you can balance the electrons and then obtain the reaction.