Can someone help me with these 2 questions?

What value of x will make the triangles similar by the sss similarity theorem?

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.