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Brianna's teacher asks her which of these three expressions are equivalent to each other.
Expression A: 9x - 3x - 4
Expression B: 12x - 4
Expression C: 5x + x - 4
Brianna says that all three expressions are equivalent because the value of each one is -4 when x = 0
Brianna's thinking is incorrect. Yes or No
Identify the error in Brianna's thinking. Determine which of the three expressions are equivalent.

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ScienceEllis
Brianna's thinking is incorrect.
Expessions A, and C. are equivalent.
For C, you add 5x and x together (because they have the same variable) to get 6x - 4.
For A, you subtract 9x and 3x (because they have the same variable) to get 6x- 4.

Brianna's thinking is not correct. The equivalent expressions are expression A and C.

Which expressions are equivalent?

An expression is equivalent when they are simplified, they have the same value.

When expression A is simplified by adding 9x and 3x, the expression becomes 6x - 4. When expression B is simplified by adding 5x and x, the expression becomes 6x - 4. So, expression A and B are equivalent.

To learn more about mathematical expressions, please check: https://brainly.com/question/11980704

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