What does the 15th and 19th Amendments have to do
with voting?

The right to vote (also known as suffrage) is an important part of our democracy. ... Ratified in 1870, the 15th Amendment recognized the voting rights of African American men. Fifty years later, Congress and the states ratified the 19th Amendment. This amendment recognized the suffrage rights of women.

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Explanation:

they can increase to boost the enonomy.

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.