How did moving the capital to baghdad expand the muslim empire?

Which of the following was probably the most difficult challenge facing construction of the railroad?

What was a major failing of the united states under the articles of confederation?

Plz which of the following provisions of the compromise of 1850 was designed to appeal to slave states? a. congress passed a strict fugitive slave law. b. the slave trade was banned in washington dc. c. texas agreed to give away some of its land so that the territory would be available for future states. d. california was admitted to the union as a free state.