# How do you evaluate variable expressions?

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## How do you evaluate variable expressions?

To evaluate an algebraic expression means to find the value of the expression when the variable is replaced by a given number. To evaluate an expression, we substitute the given number for the variable in the expression and then simplify the expression using the order of operations.

## What is the value of the expression 3a b )( a 2b when a 2 and B 3?

18
The answer is 18. In order to evaluate this expression, you must replace a and b with the numbers 2 and 3. You must also remember that the expression…

How do you evaluate an expression step by step?

Here are the steps for evaluating an expression:

1. Replace each letter in the expression with the assigned value. First, replace each letter in the expression with the value that has been assigned to it.
2. Perform the operations in the expression using the correct order of operations.

### How do you evaluate a variable?

To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then evaluate the expression.

### What is the answer of 3a 2b )( 3a 2b?

The answer to the question is 9a^2 – 4a^2.

What is evaluate expression?

To evaluate an algebraic expression means to determine the value of the expression for a given value of each variable in the expression. Replace each variable in the expression with the given value, then simplify the resulting expression using the order of operations.

## How do you evaluate an expression example?

Evaluating Algebraic Expressions

1. Evaluate x + 3 for x = 7.
2. Evaluate x2 + x – 3 for x = 2.
3. Evaluate y2 + x3 + 7 for y = 2, x = 1.
4. Evaluate 5 – x2 for x = -2.
5. Evaluate (3x)(5y) for x = -1, y = 2.
6. Evaluate -7×2 -5 + y2 – x for x = -2, y = 4.
7. Evaluate 3×2 ÷ 12 + y for x = 4, y = -7.  By Admin