The correct answer is: "He developed mathematical principles"
René Descartes (1596 – 1650) was a French philosopher, mathematician, and scientist who lived more than 20 years in the Dutch Republic and was one of the main figures of the Dutch Golden Age.
His great influence in mathematics has been his major contribution to the Scientific Revolution, although his work in philosophy is outstanding too. He developed the the Cartesian system of coordinates. He is considered the father of analytical geometry, which connects both algebra and geometry and which has been used in the development of infinitesimal analysis and calculus .
Answer:
To let people 18 years or older allowed to vote.
It was a step towards racial equality and a major point in the Civil Rights Movement. Although it took the Voting Rights Act to finally enforce it, African Americans were supposed to be citizens with the right to vote since the passage of the 14th and 15th Amendments to the Constitution.
Answer:
The foreign policy of the Ronald Reagan administration was the foreign policy of the United States from 1981 to 1989. The main goal was winning the Cold War and the rollback of Communism—which was achieved in the Revolutions of 1989 in Eastern Europe during 1989 and in the Dissolution of the Soviet Union in 1991.
