Total dues
[tex]8.50\cdot15[/tex]total dues= $127.50
if nine of them paid the total of their dues means that $76.5 were paid
[tex]9\cdot(8.50)=76.5[/tex]the club needs to collects the difference
[tex]127.5-76.5=51[/tex]answer: The club need to collect $51 from the remaining memebers.