Question

# An equation that expresses a relationship between two or more variables, such as displaystyle{H}=frac{9}{{10}}{left({220}-{a}right)}, is called displa

Modeling
An equation that expresses a relationship between two or more variables, such as $$\displaystyle{H}=\frac{9}{{10}}{\left({220}-{a}\right)}$$,
is called $$\displaystyle\frac{a}{{{a}{n}}} ?.$$ 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 ? .

Thus, the complement statement is "An equation that expresses a relationship between two or more variables, such as $$\displaystyle{H}=\frac{9}{{10}}{\left({220}-{a}\right)},$$
is called $$\displaystyle\frac{a}{{{a}{n}}}$$ 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 ".