Asubmarine descended y meters. it was then 900 m below sea level if y = 200, how far below sea level was the submarine to start with?

700m

Explanation:

the equation is

went down y = 900

so it would be

200 - 900 = 700m

sumerians were responsible.

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.