Answer:

Explanation:
It seems like your question is incomplete, so I will assume it is asking for an expression that represents how many cookies Anna has left.
Let t represent the total number of cookies left. Let's build this expression. If each batch contains c cookies, and there are 3 batches, the total number of cookies baked is 3 times c. Since she ate 8 cookies, 8 must be subtracted from that total. Therefore:

Hope this helps!