What is one problem that might commonly occur when one is bartering? Someone wants to trade a valuable item for a less valuable one. Two people have different ideas about the value of an item. Someone wants to barter a good in exchange forA currency is a system of money created and used by an individual or a group of people. all people who live in the same era. a nation or region of the world. a town, city, or state within a region.

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Select all of the following expressions that are equal to 2.5.