What was the main purpose of the fifteenth amendment

In a planned economy, which of the following does the job of market forces in order to determine the outcomes?

Which statement best describes a contribution of the works of nicolas copernicus and galileo galilei?

Put the following events in the correct chronological order: i. new state constitutions are formed. ii. declaration of independence is signed. iii. second continental congress writes the articles of confederation. iv. special conventions are convened to produce fundamental laws for the states. a. ii, iii, iv, i b. ii, iv, i, iii c. ii, i, iv, iii d. ii, i, iii, iv