A company charges a fixed setup fee of 12 pounds plus 4 pounds for every metre of cable and 1.50 pounds for each connector. They supply c connectors and m metres of cable. (a) Write an expression for the total cost in terms of m and c. (b) If they supply three times as many connectors as metres of cable, express the total cost in terms of m and simplify. Give your final answer in fractional form where appropriate.
(a)(a) Write an expression for the total cost in terms of m and c.(1)
(b)(b) Given c = 3m, write the total cost in terms of m and simplify. Give final answer as a fraction where appropriate.(2)
(Total for Question 14 is 3 marks)