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How do I plug in a variable?
You cannot plug in a variable, what you do is plug in the value for a variable. If you know the value of the variable in an equation (or formula), the process of replacing that variable whenever it appears in the equation by its value is called plugging in the value for the variable.
Is a decrease in the independent variable and a decrease in the dependent variable a positive correlation?
yes
What does 2a mean in math?
In mathematics, the expression "2a" represents the product of 2 and the variable "a." This means that you are multiplying the number 2 by the value of the variable "a." The result will depend on the specific value assigned to the variable "a."
Explain what the word variable means in mathematics?
In mathematics, a variable is a representation, in the form of a letter, of a numerical value. Variables are traditionally used when the value it represents is either unknown or can vary.
What is to substitute for a variable and perform the given operations?
that means to replace the variable with it's value, and then do all the mathematical symbols as normal (+-x/)
