Jenny charges for delivering the cakes £4 fixed cost + 60 p per mil Bob lives 12 miles away. How much will Jenny charge to deliver the cakes?

You can set an equation that relates the total charges to the fixed cost and the number of miles. This is Charge (m) = 4 + 0.60 * m. Where 4 represents the fixed charge and m the numbrer of miles. In this case m = 12, which gives: Charge (12) = 4 + 0.60 * 12 = 11.2. And the answer is that Jenny will charge 11.2 sterling pounds to deliver the cakes.