Hi, I was hoping that someone might be able to please help me with this proof. Prove that var(x+y) ≤ 2(var(x) + var(y)). So far I have: var(x+y) = var(x) + var(y) + 2cov(x,y) where the cov(x,y) = E(xy) - E(x)E(y), but I'm not really sure to go from there. Any insight would be very helpful! Thanks!