After the united states withdrew from vietnam, communists a. allowed non-communists to serve in government b. gained control of vietnam, cambodia, and laos c. maintained diplomatic relations with the united states d. lost control of vietnam, cambodia, and laos (gradpoint)

B. gained control of vietnam cambodia and laos

They immigrated for religious freedom

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].