Does this equation have one solution, no solution or many solutions

What role does an american citizen play in its own government ?

What was the compromise that allowed california to be admitted to the union

How did the spanish-american war affect american expansionism? a.) america took control of hawaii, cuba, and the pacific islands of guam. b.) america took possession of cuba and the philippines. c.) america gained control of puerto rico and hawaii. d.) america gained control of cuba, puerto rico, the pacific island of guam and the philippines.