You can put this solution on YOUR website! Notice that the degree of the numerator is 9 and the degree of the denominator is also 9. Send me an Email if you need additional explanation of this!
If the degrees of the numerator and denominator are the same, then there is a horizontal asymptote at y = (ratio of the leading coefficients of the numerator and denominator. In this case, it will be y=-10/1=-10.