To determine which expressions represent the model, we first need to clarify what kind of model we're referring to. However, given the expressions you provided, it appears that we are looking at representations of a multiplication or addition involving the numbers 4 and 5.
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4 + 5: This represents the addition of 4 and 5, which equals 9.
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4(5): This represents the multiplication of 4 and 5, which equals 20.
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20: This is the result of 4(5), so it can be considered a representation.
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5(4): This also represents the multiplication of 5 and 4, which equals 20 (the same as 4(5)).
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5(5): This represents the multiplication of 5 by itself, which equals 25. This does not relate to the previous expressions involving 4.
If the model is about the multiplication of 4 and 5 (as indicated by the products), then the expressions that apply are:
- 4(5)
- 20
- 5(4)
If the model doesn't involve any specific instructions or context, we can't definitively select expressions with certainty, but based on common mathematical interpretation, these three would definitely be applicable.
So, the expressions that represent this model, assuming it is focusing on multiplication, are:
- 4(5)
- 20
- 5(4)