Here's the question you clicked on:
NeonaW
A ticket to the movies costs $7. You have $21. How many tickets can you buy?
i dont know, maybe 3
2 problably if you pay tax
Assuming no other taxes and stuff, you can get 3 tickets... But that depends on the percentage of taxes...
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The problem does not state the taxes where going to be charged!
hey man there's always a tax to pay
@LagrangeSon678 that is why I've stated the assumption of no tax, to make calculation easier.
you got food tax, water tax, gas tax, and now you have movie tax
But we don't know how high the tax is. That is why I've made that assumption, which I stated. Hence, since I've stated my assumption, it means that this answer holds if and only if my assumption holds. (i.e. If my assumption holds, the number of tickets you can buy is 3. However, if my assumption does not hold, depending on the tax rate of all the items, I can only buy 2 or 1 ticket(s)).
charging tax for movie tickets is standard practice