That will depend on the requirements and compatibility of the specific APPs you want to run. The Lenovo Chromebook Duet ships with the Chrome Operating System and is compatible with Google Play Store APPs. We recommend you check with the specific APPs software publisher's web sites for their compatibility with the Chrome operating system and the minimum/recommended hardware requirements (Is a Graphics card required, the processor speed and the minimum required system RAM and the minimum available hard drive space) to run their program, then compare those requirements to this system's configuration.

Yes, the AC power cord that connects to the wall socket is included. It is a USA compatible plug.

No. The Intel Evo-Certified, Lenovo Yoga 7i 14 model number 82BH000CUS, ships with 12GB DDR4-3200MHz RAM soldered memory, and is not upgradable.

If you already have an active Microsoft Office 365 Account, you can just sign in to that account using your existing User Name and Password within the Microsoft Office 365 software that is installed on this computer as part of Windows 10 Operating System. If you have not purchased a subscription to Microsoft Office 365, there is a 30-day trial of Microsoft Office 365 included as part of the Windows 10 operating system. In order to keep the program active after the trial period, you will need to purchase a product key. You will not need to download any additional software.