Ali simplifies the expression 9y+y to 9y2

This would be an incorrect simplification.

Step-by-step explanation:

9y+y would be the same as having 9 apples, and then buying another apple. How many do you have now? Well, you'd have 10 apples. In this case, y would be the number of apples we have.

Hence, to write this in an expression, it would look like:

10a

9y2 doesn't really mean anything. That would sort of be saying I have 9 apples, and then I double that amount, not to just add one more.

Now let's review. To explain this more thoroughly, let me explain what each part of this expression means.

The first term, 9y- this represents the amounts of apples, or y's, we already have.

+y means we added another apple.

If you wanted to simplify, it would become 10y, or 10 apples total.

Hope this helped!

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step-by-step explanation: