Answer:
Ancient India cast system
Henry Bell- Steam-powered boat. Invented in 1812.
Eli Whitney- Cotton Gin. Invented on March 14, 1794.
James Watt- Steam Engine. Invented in 1765.
If you want good sources go to wikipedia and look at the sources used in the wikipedia article. DO NOT USE THE WIKIPEDIA ARTICLE ITSELF AS A SOURCE!
Answer: The solution is (2, -2)
Explanation: The way to solve this is quite simple. Simply graph each equation and then find the intersection point which in this case is (2, -2) which is your answer!