I need help plz aijahsg

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

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.

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9