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To evaluate a function for a specific value substitute the value in for what?
You substitute the variable for its value. Or you substitute the variables for each of the values.
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."
How do you find a specific numerical value for an algebraic expression?
you have to deduce the variable and evaluate the expression.
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.
Can y equal zero?
If you define a variable, it can have ANY value - so yes, that includes zero.In a specific problem, it may have a specific value; which may be given, or you might need to figure it out.
