Jackson the democrat feared that annexing Texas would lead to a war with Mexico which he was not ready for. However,another problem was caused by the issue of balancing slave states with free states. Texas was a free state and therefore would cause an imbalance to the union.
The tree levels of sumerian society are Upper class (contained nobles, priests, government officials and warriors), Free man Class (Merchants traders and artisans, and slavery.
Oh sorry i didnt read the other part of the question...
A rate allows us to compare two numbers or measurements and give them a value. This helps us in real life to make everyday activities simpler. For example: you have to take a photocopy as quickly as possible and you have two photocopiers. The first draws 10 copies per minute and the second only 5 copies per minute. Using the rates you can know that the first option in better because you will have the double of copies in the same time. Another example is a place where you get 2 pizzas for $10 and another where you get 1 for $8. The rates help you to know that in the first place they give you 1 pizza for $5 (10÷2=5) so it is a cheaper option.
