Can a 20 inch monitor be hooked up to a laptop?

Answer:

Yes, look to the side of the laptop, or the backbone, where ever and find a VGA slot. There you can plug surrounded by the monitor input. When it's plugged in, receive sure it is on, then right click on your desktop and click properties. There, you will see a Settings Tab, in attendance it will let you trade between the monitors.
yes
yes, adjectives you need is a cable..
Yes, but it also depends on the laptop. You'll have need of to find out the resolution of the monitor and then find out if the laptop can support that resolution on an external monitor. Most laptops from the final year or two should be able to fiddle with it with no problem.
Yes, on your laptop near should be a place to hook a monitor up. It should look just approaching the plug that is on the final of a disktop.
If it has the right port yes.

If it doesnt in that are also docking stations that would have the port for hooking it up.
Typically yes. what you are going to want to check is the supported resolution of the video card within the laptop. If the monitor is a CRT you have a large amount of flexibility to accept anything output is likely from the laptop. If the monitor is an LCD you will want to set the laptop VC to the Native resolution of that blind - Otherwise you get a fuzzy picture.



The two principal ways to set up you screen within windows is as a extension of you desktop or as a duplicate/replacement for your desktop.
Sure. Just turn past its sell-by date you laptop, plug the monitor into the back of the laptop after turn on the laptop.