Podcast Beta
Questions and Answers
Which of the following is an algebraic expression?
What is the correct order of operations for evaluating algebraic expressions?
What is the value of $2a + 3b - 5c$ when $a=4$, $b=2$, and $c=3$?
Study Notes
Algebraic Expressions
- An algebraic expression is a mathematical phrase containing variables, constants, and mathematical operations.
Evaluating Algebraic Expressions
- The correct order of operations is: Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction (PEMDAS).
Evaluating Expressions with Variables
- To evaluate an algebraic expression, substitute the values of the variables into the expression and follow the order of operations.
- Example: $2a + 3b - 5c$ when $a=4$, $b=2$, and $c=3$
- Substitute values: $2(4) + 3(2) - 5(3)$
- Evaluate: $8 + 6 - 15 = -1$
- Therefore, the value of the expression is $-1$.
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Description
Test your knowledge of algebraic expressions with this quiz. Determine the correct order of operations, identify algebraic expressions, and practice evaluating expressions with given values of variables.
