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madreJ [45]
3 years ago
15

Brianna's teacher asks her which of these three expressions are equivalent to each other.

Mathematics
2 answers:
jekas [21]3 years ago
7 0
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.
Otrada [13]3 years ago
3 0

Brianna is correct about the situation when x=0.  But you can't say that
expressions are really equivalent unless they have the same value for <u>
EVERY</u> 'x', no matter what it is.

Expressions <em>'A'</em> and <em>'C'</em> will do that.  But Expression 'B' won't, unless x=0.


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