What is the value of ao

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

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

Find the value of x for which abcd must be a parallelogram -9-6x x-30