Cho biết X và Y là hai biến ngẫu nhiên độc lập. Tính I=Var(5X-7Y+2010) biết các phương sai VarX=a và VarY=b.

Why do many scientists suppose the land bridge theory of migration?

Which of these is the modern day result of spain colonization of the americans?

Why did united starr’s fail to join the league of nations? a-great britain and france would not allow the united states to join the organization. b-woodrow wilson and his opponents refused to compromise on the wording of the treaty of versailles. c-americans preferred to join a military alliance with britain instead. d-senator henry cabot lodge failed to persuade enough senators that the league would benefit the united states?