A weekly pay (five-day work week) is $100.
The average tip is $5.
The waiter wants to make at least $450 in a five-day work week.
So we have to find out how many times the waiter must serve.
So, first we do $450 - $100 since the waiter already makes $100.
$450 - $100 = $350
Then the waiter gets an average of $5 tips.
So, we do $350 / $5.
$350 / $5 = 70
Our answer is 70.
So, the waiter must serve 70 tables to make at least $450.
Hope this helps you! (:
-PsychoChicken4040