The Mexican-American War was a conflict between the United States and Mexico, fought from April 1846 to February 1848. ... It stemmed from the annexation of the Republic of Texas by the U.S. in 1845 and from a dispute over whether Texas ended at the Nueces River (the Mexican claim) or the Rio Grande (the U.S. claim).
I think the answer for the first one is "5 percent charged on purchases of ordinary goods."
For the second one I think the answer is "A tax that charges more for higher incomes."
2: chemical energy in bonds of organic molecules sounds about right....
Wheres the picture? i don't see a diagram
<span> The use of farming to feed a larger population</span>
