Which factors make central america important to u. s. foreign policy?
coal mining
military bases
technological innovations
the panama canal

The biggest one would probably be the panama canal. The canal is such a large trade route that without it, modern day trade would greatly decrease, hurting your country greatly. So you want the foreign policy to make sure the panama canal is open for you.

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].