Step 1 To evaluate b j 3 6 -5f(x) dx, use the following property of the definite integral. Lokf b kf(x) dx = k k f(x) dx Then, Step 2 13 L "6 6 -5f(x) dx=-5 -5 f(x) dx. To evaluate L 3 6 L 6 -5f(x) dx, substitute -5f(x) dx = 6 f(x) dx = in 6 - L f(x) dx. 3 Therefore, 6 -5f(x) dx = -5( 3 =