Can someone please help me

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

Find the value of x. round the length to the nearest tenth