Please help me answer these questions

1)
A.Why did the Republic of Texas hope the United States would annex Texas?

B.How would the addition of Texas as a slave state affect the union?

2)
A.What did the United States gain as a result of the Mexican-American War?

B.How do you think the Mexican-American War affected the relationship between Mexico and the United States?

4) Many U.S. senators wanted to ANNEX Texas, ______.

5) In Mexico, Santa Anna established a DICTATORSHIP, ______.

6) The Mexicans laid SIEGE to the Alamo, ______.
i will give 20 points and brainiest user to whoever gives me a answer k