What are three different ways to introduce a narrative story?

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

Which of the following are accepted without proof in a logical system? check all that apply.

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)