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It is the domain of the expression.
Take the value of each variable in the expression and replace the variable by its value. Then do the math!
Replace each variables in the algebraic expression by its [known] value and calculate the value (ie evaluate) of the algebraic expression.
That means that you replace something, for something else. For example, a variable for a number, or a variable for some other expression.
Assuming you call your number "n", the expression would be "14n". You can replace "n" with whatever variable you want to use.
It is the domain of the expression.
Take the value of each variable in the expression and replace the variable by its value. Then do the math!
Replace each variables in the algebraic expression by its [known] value and calculate the value (ie evaluate) of the algebraic expression.
When you replace a variable with a quantity, it is called a substitution.
That means that you replace something, for something else. For example, a variable for a number, or a variable for some other expression.
Assuming you call your number "n", the expression would be "14n". You can replace "n" with whatever variable you want to use.
A variable is a letter that represents a number. An expression that contains at least one variable is called variable expression, also called algebraic expression. A variable expression has one or more terms. A term is a number, a variable, or a product of numbers and variables. For example,3(x^2)y + 2xy + x - 7 is a variable expression, where you have 4 terms.When working with variable expression, you often use the substitution principle:If a = b, then a may be replaced by b in any expression.The set of numbers that a variable may be represent is called replacement set, or domain, of the variable. To evaluate a variable expression, you replace each variable with one of its values and simplify the numerical expression that results.Example: Evaluate the expression 2x - 4y for x = 5 and y = -9.Solution:2x - 4y= 2(5) - 4(-9)= 10 + 36=46
To evaluate a variable expression, replace all the variables with numbers and simplify the resulting numerical expression. 3m for m = 9 3(9)=27
You have to substitute a value for the letter variable in the expression. This is what we call evaluating the algebraic expression. An example would be 3x+1=7, when x=2.
You replace each variable by its value. Then you do the indicated calculations.
You can replace a variable with an equal value or expression. Just make sure the same variable always gets the same value or expression.
The term for replacing a variable with another value or expression is "substitution."