The value of the variable is 9.3
What is a variable ?
Any mathematical object can be represented by a variable in mathematics as a symbol and placeholder. A variable can, for example, represent a number, a vector, a matrix, a function, the argument of a function, a set, or a set's component.
There are many variables, including height, age, wealth, province of birth, academic standing, and kind of dwelling. Two major categories—categorical and numeric—can be used to group variables.
As you can see, categorizing variables into four separate groups is one approach to see them ( nominal, ordinal, interval and ratio).
0.9g - 2.1h
Substitute the values g = 15 , h = 2
0.9(15) - 2.1(2)
13.5 - 4.2
= 9.3
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