There is no limit to the number of variables a formula can have.
All variables except one, the experimental variable, are kept constant in an experiment.
An experiment of any kind can have infinitely many variables. A controlled experiment can have just as many, provided that all but one are kept exactly the same.
There are three types of variables tested: manipulated variables, controlled variables, and experimental variables.
It can have as many as it needs. You can even change different variables at the same time and study their individual influence with proper statistical tools in many type of experiments.
An experiment in which all variables stay the same is called a "controlled experiment".
More than one (apex)
There is no limit to the number of variables a formula can have.
More than one (apex)
It can represent formulas like A=L×W etc...
Because mathematical formulas can only describe dynamic changes if some elements (variables) vary in relation to other variables.
By inserting the known quantities into their respective variables.
The technique is known as algebra.
The formulas vary in what variables are related. Therefore it is sometimes useful to use one of the formulas, sometimes another, depending on what you know.
V=IR Not a good question tbh as there many formulas for working out voltage using different variables and constants.
All variables except one, the experimental variable, are kept constant in an experiment.
An experiment of any kind can have infinitely many variables. A controlled experiment can have just as many, provided that all but one are kept exactly the same.
They will have different variables, in different configurations.