In a Mathematics test, Shaleen scored (5ay-10ax) marks and Clare scored (8x-4y) marks.
(A) Factorise completely
(i) 5ay-10ax,
(ii)8x-4y.
(B)Express the total marks of Shaleen and Clare. Give your answer in factorised from.
(C) Given that their total mark is 126 when a=5, show that y=6+2x.