any one can help me thank you that would be awesome!!!

Question

 

 

Two devices with capacitances of 21.9 µF and 7.6 microF are each charged with separate 120 V power supplies. Calculate the total energy stored in the two capacitors

Answer 1

U = U₁ + U₂ = C₁V²/2 + C₂V²/2

 

You have C₁ and C₂, and V is the same for both.  Just plug in the numbers.