2021-02-19

An equation that expresses a relationship between two or more variables, such as $H=\frac{9}{10}\left(220-a\right)$,
is called $\frac{a}{an}?.$ The process of finding such equations to describe real-world phenomena is called mathematical ? .
Such equations, together with the meaning assigned to the variables, are called mathematical ? .

### Answer & Explanation

grbavit

A formula can also be called an equation that expresses a relationship between two or more variables.
The action of finding formulas to describe real-world phenomena is called modeling.
A formula models real-world phenomena means that the formula gives a relationship between the variables that represents the real life situations.
Thus, the complement statement is "An equation that expresses a relationship between two or more variables, such as $H=\frac{9}{10}\left(220-a\right),$
is called $\frac{a}{an}$ formula . The process of finding such equations to describe real-world phenomena is called mathematical modeling . Such equations, together with the meaning assigned to the variables, are called mathematical models ".

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