A particle moves along the curve y=4x29x8\displaystyle {y}={4}{x}^{{2}}-{9}{x}-{8} in such a way that as it moves, dxdt=4\displaystyle \frac{{{\left.{d}{x}\right.}}}{{{\left.{d}{t}\right.}}}=-{4} units/minute.

When the particle reaches the point (7, 125) it is moving the origin at a rate of units/minute. (Enter your answer rounded to 3 decimal places)