when the number of students of a school was increased by 30%it became 455.find the previous number of students

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

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.

Can some one explain this i got sent this. is this a threat i’m scared