What number must you add to complete the square. x^2-20x=17

Summarize the effects of the marshall plan on the us and western european countries

Why are nation-states difficult to create?

Which of the following could be seen as a weakness of a two-party system? a. the two-party system limits voters' options in electing officials.b. the two-party system limits debate on issues.c. the two-party system limits the range of solutions that will be considered.d. all of these are weaknesses