any number at all
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is a number and/or variable combined with math operations used to represent a number.
A variable is assigned to represent an unknown quantity.
Well, we in the math world represent the independent variable as x. It does not depend on anything. For example, one chocolate bar costs 2.50$. The independent variable is the number of chocolate bars ( the other variable does not decide how many chocolate bars are being bought), and the dependent variable is the cost (depends on the number of chocolate bars). Have a nice day and i hope you ace your math tests!
Variable: A letter or symbol used to represent a number or quantities that vary
It can represent anything. When stating a specific problem, you should clarify what each variable represents.
A variable is an unknown number represented by a letter