The relevant legislation varies from country to country. Since you have not bothered to identify the country of interest it is not possible to give a more helpful answer.
a 17 year old can work 26 hours per week
It depends on the legislation of the country.
40 hours. You are an adult at 18 .
40
A 16-year-old can work up to 18 hours per week during school weeks.
40 hours a week
im 17 and I worked 39 hours this week
In Texas, a 17-year-old can work a maximum of 30 hours per week during school.
well during the school week you can work 3 hours after school and how ever many on weekend and 18 hours per week max during school year and during the summer you can work 40 hours a week and until like 10pm
well when you are 15 or a high school student you need to work 15 hours a month or week , to not get behind
18-20 hours a week.
I'm 16 years old now and I stay on the WestBank (Louisiana) and when I went to a interview at McDonalds, the Hiring Manager told me a 16 year old can only work 3-4 hrs a day, and if you work more you MUST take a break.... I know, it sucks because when you think about it, the most you'll get paid is $7.50, but, hey, it's better than nothing!