Why do we use variables, and what is the significance of using them in expressions and equations?

1 answer:

5 0

Variables are letters from the end of the alphabet
Economics always uses the firsts letter of whatever that letter is representing.

 An expression such as 4x3 is a variable. It can assume different values because x can assume different values.

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Step-by-step explanation:

First, let's figure out how to get the volume of a sphere from its surface area. If r is the radius of our sphere, then

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