I’m stuck and it’s late and it’s due tomorrow

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.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

What is the solution set of the quadratic inequality x^2-5< or equal to 0