What does this mean and what is it used for?

a+b=c
a+e=f
c=f

also tell me if this does not make sense

Complete the statements about the system of linear equation respresented by the tables the equation respented the left table is

What is always true about a positive integer raised to a negative odd power?

The volume, v, of a rectangular prism is determined using the formula, where / is the length, w is the width, and his theheight of the prism. carltren solves for w and writes the equivalent equation w=using this formula, what is the width of a rectangular prism that has a volume of 138.24 cubic inches, a height of 9.6 inches,and a length of 3.2 inches?