What is the scale factor of triangle abc to triangle def?

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.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Which two undefined geometric terms always describe figures with no beginning or end?