Look at this model. Which expression is shown by model?
- 3x²
- 3x + 2
- 5x
- None of these
Explanation
"3x" usually represents 3 rectangles (each representing x).
"+2" typically means 2 small unit squares (each representing 1).
So, a model showing 3 long bars and 2 small squares matches 3x + 2.
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