Hi I did 1st 2 but need help with rest simplifying these and I need them explained step by step plz and thank you ​

Which graph represents the following piecewise defined function?

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 number completes the inequality? 2/3 < _ < 7/9