Chris and Nathan order a giant cookie together. If Chris eats $\frac{2}{7}$ of the cookie and Nathan eats $\frac{3}{5}$ of the cookie, what fraction of the original cookie is left?

A transcontinental railroad would allow for settlement of the west, open new markets for eastern manufacturers, and bring relief to overcrowded eastern cities. Some even believed that it was divinely intended that Americans should control the whole of the continental U.S. In 1845, a Democratic journalist named John L.

4

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