~10 brainliest points ~~ brainliest for first person who answers properly ~i am conducting a survey on the dehumanisation of slaves. complete the survey using the following link: you do not need to know about this topic, you just have to answer the questions honestly and properly. do not answer this if you have already answered the other question for this survey. let others have a chance. you if you completed the survey. : )

answer; i believe its called ; checks   and balances;

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.