Answer asap im not sure what it is

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

How do you find the area of a triangle

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart