l know that my wheels have 5 lugs but im looking at sum wheels and im bout ready to get em and then l noticed that it says 5 on 5.5. what does that mean? will they work.

5 on 5.5 means five holes on a 5.5'' bolt circle. Often you will see 5 on 100mm or 5 on 117.5mm. The bolt circle passes through the center of each hole.

The B4000 is the same as the Ford Ranger.

This is where l usually suggest you go, but the site is down right now:
discountedwheelwarehouse.com/Vehicle_Bolt_Pattern_Reference.cfm

The Mazda B-series is a Ford Ranger with different stickers in that year. The wheel pattern is 5 x 4.5. Same as the Exploder, Mustang, etc.