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Verified Answer :

lekhagummalla

5y*3
This models the relationship as 5y times 3

But the question says to model the relationship as 5y plus 3.

Therefore, the right answer is 5y+3

!!!HOPE THIS HELPS!!!

SchwarzschildRadius

So,

5y3 is the open phrase the student uses to model "the sum of 5y and 3".

"The sum of" means addition.  The student put 5y3, while the sum of 5y and 3 is actually 5y + 3.

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