Let f(x) = x2 − 81. Find f−1(x)

Common binomial factor of 6x(3x+7)+5(3x+7)

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x

Round to the nearest ten thousandth.i dont get this