Final answer:
Helene earns a total of $625 per 5 day work week, which includes her $250 base salary and $375 in tips ($75 per day).
Step-by-step explanation:
The question asks us to calculate how much Helene earns in a 5 day work week, considering her weekly salary and average daily tips. Helene's weekly earnings are $250 from her salary. In addition, she earns $75 per day in tips over a 5 day work week. To calculate her total weekly earnings, we add her salary to her total tips for the week ($75 per day times 5 days).
The calculation for her total weekly earnings would be:
$250 (weekly salary) + ($75/day × 5 days) = $250 + $375 = $625.
Hence, Helene earns $625 per 5 day work week.