You can use a QCD to satisfy your RMD for the year. A QCD can exceed your RMD amount for the year as long as it does not exceed the $100,000 annual limit.
Just keep in mind that most states do not recognize a QCD for state tax purposes, so you will owe state taxes on the sum total of all the distributions.
Not really true (in California anyway). On Cal form 540, the adjusted gross income is whatever it is on the US 1040. The 1040 gross income number takes into account the QCD, so at least indirectly California does reflect the QCD. You don't have to add the money that went to charity back into your Cal 1040 income.