23. [0.43/1.66 Points] DETAILS PREVIOUS ANSWERS SCALCET9 2.7.009. (a) Find the slope, m, of the tangent to the curve y = 4 + 5x - 2x at the point where x = a. m = (b) Find equations of the tangent lines at the following points. (1, 7) y = (2, 8) y = (c) Graph the curve and both tangents on a common axis