Suppose that y = 2x 5 and y = -3x + 7 are the equations of the tangents to the curves y = f (r) and y = g(x), respectively, at the point where x = 1. Find the slope of the tangent to the curve y = f(x)g(x) at the point where x = 1. () -6 (b) 17 () 18 (d) -12 (e) none of these