Answer: Dexter's expression, which is 3g-2, is incorrect because it does not accurately represent the number of cupcakes left after he takes two cupcakes out of each box and eats them.
To understand why Dexter's expression is incorrect, let's break down the steps:
Initially, there are g cupcakes in each box.
Dexter takes two cupcakes out of each box and eats them.
After Dexter takes two cupcakes out, there should be g - 2 cupcakes left in each box.
Therefore, the correct expression to represent the number of cupcakes left after Dexter takes two cupcakes out of each box would be g - 2.
