How might demography be helpful in planning for the future? A. Demography can help us understand the physical geography of our area.

B. Demography can help us understand the natural processes that cause earthquakes. ion 3

C. Demography can help us plan for the needs of our population.

D. Demography can help us understand weather patterns.

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].