The circumference of the target above is 6,901.72 mm. What is the diameter of the target? (Use 3.14 for .)
A.
1,099 mm
B.
549.5 mm
C.
4,396 mm
D.
2,198 mm

South wales composes a lot of coal in that region.

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].