The major trading center of carthage was located in modern-day
a. turkey
b. morocco
c. algeria
d. tunisia

The ancient city of Carthage is today a suburb of Tunis- the capital of Tunisia (this is the correct answer).

Carthage was the capital of the Phoenician Empire and the Phoenicians' biggest contribution to the modern world is that they brought the Egyptian script to the Greek, and changed it on the way to an alphabet. 

The answer is c epicenter

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].