Why does the sun appear to be the brightest star in the sky? A: It is the largest star in the galaxy so it is the brightest star.
B: It’s relative distance to earth is closer than the other stars.
C: It’s apparent brightness is much greater than the other stars.
D: It burns more gas making it brighter than any other star.

Don’t use up to much of them it leads to pollution

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].