50 times what equals 10 million

Create another three examples that does not behave like a function. explain why your chose each example to fit the category be very

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

What is the inverse of the function f(x) = 2x + 1?