I need help again!! :)

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

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

What is the measure of sty in oo below? 130 310 230 50