6x + 9 is an _____?
- equation
- true sentence
- false sentence
- expression
Explanation
6x + 9 is an expression
So, the expression 6x + 9 represents the sum of 6 times the value of x and 9.
The value of x can vary, but the expression remains the same structure.
For example, if x = 2, then the expression becomes:
6(2) + 9 = 12 + 9 = 21
If x = -1, then the expression becomes:
6(-1) + 9 = -6 + 9 = 3
Therefore, the expression 6x + 9 is a mathematical representation that combines a variable (x) with constants (6 and 9) using addition.
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