Algebraic expressions (Part 1)INTRODUCTION TO ALGEBRAIn the expression below, which part is the variable?k2+7𝑘2+7Answer:The variable is:

Identifying the Variable in an Algebraic Expression

1. Understanding the Expression: The given expression is $k^2 + 7$. This consists of two terms: $k^2$ and 7.

2. Definition of Variable: A variable is a symbol used to represent an unknown quantity in mathematical expressions. It can take on different values.

3. Analyzing the Terms:

   • In the term $k^2$, $k$ is raised to the power of 2, indicating that it is a variable.
   • The term 7 is a constant, which does not change.

4. Conclusion: The only part of the expression that varies is represented by the symbol $k$.

Final Answer

The variable is: $k$.