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Q: When you replace the variable with a number and perform the operations you blank an expression?

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In Evaluating Expression first,replace each letter in the expression with the assigned value. second,perform the operations in the expression using the correct order of operations and the last you got the answer

When you replace a variable with a quantity, it is called a substitution.

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

If you replace variables in an expression by numbers (in case there are any variables) and then do the indicated operations, you get a number. That final number is the "value" of the expression.

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that means to replace the variable with it's value, and then do all the mathematical symbols as normal (+-x/)

You replace each variable by its value. Then you do the indicated calculations.

In Evaluating Expression first,replace each letter in the expression with the assigned value. second,perform the operations in the expression using the correct order of operations and the last you got the answer

It is the domain of the expression.

The term for replacing a variable with another value or expression is "substitution."

You can replace a variable with an equal value or expression. Just make sure the same variable always gets the same value or expression.

Take the value of each variable in the expression and replace the variable by its value. Then do the math!

to evaluate an algebraci expression replace ech variable with a number. then follow the order of operations to dimply the expressio. Hope that helped :)

Replace each variable in the expression by its value and then find the value of the expression.

When you replace a variable with a quantity, it is called a substitution.

Substitution

evaluation, evaluate.

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