Please I need help! Answer as soon as possible

Write a corresponding real world problem to represent 2x - 125=400

What point is the projection of q on a) r b) s c) t

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.