I hold three memory slots for my computer which two are for the memory or are they adjectives for the memory?

i enjoy a dell optiplex 110

I hold three memory slots for my computer which two are for the memory or are they adjectives for the memory?

They all are for memory
Yes 3 slots = 3
adjectives 3 are for memory
if you have three spaces ... on the RAM slot afterwards theyare all for RAM.
They are adjectives for memory provided they are all together side by side you can also progress to http://www.4allmemory.com/index.cfm?pid=... and it will tell you how much memory your gadget can use and what type etc.
all for memory
Run the scan at http://www.crucial.com and you can see what your motherboard supports (maximum memory amount) and yes adjectives 3 are for memory !!