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Questions and Answers
Which of the following is an algebraic expression?
Which of the following is an algebraic expression?
- $x+5$ (correct)
- $\frac{4},{3}\pi {r}^{3}$
- 5
- $\sqrt{2{m}^{3},{n}^{2}}$
What is the constant in the expression $x+5$?
What is the constant in the expression $x+5$?
- x
- 5 (correct)
- +
- None of the above
What is the variable in the expression $x+5$?
What is the variable in the expression $x+5$?
- x (correct)
- 5
- +
- None of the above
Which of the following is an example of exponential notation?
Which of the following is an example of exponential notation?
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How are constants and variables treated in algebraic expressions?
How are constants and variables treated in algebraic expressions?
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Study Notes
Algebraic Expressions
- An algebraic expression is an expression that includes variables, constants, and mathematical operations.
Identifying Variables and Constants
- In the expression $x + 5$, $x$ is the variable, which is a symbol that represents a value that can change.
- In the expression $x + 5$, $5$ is the constant, which is a value that does not change.
Exponential Notation
- Exponential notation is a shorthand way of writing repeated multiplication of a number by itself, for example, $2^3$ means $2 \cdot 2 \cdot 2$.
Treating Constants and Variables in Algebraic Expressions
- In algebraic expressions, constants and variables are treated differently: constants have fixed values, while variables can take on different values.
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