An electricity company estimates that Daryl will spend £440 on electricity next year. An administration charge of 15% is added. Daryl wants to pay in four equal instalments throughout the year, How much should each payment be?

The scale factor of what ?

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.

Value for line ac: (3x+6)+(2x+14)= 5x+20