C = 0.5n + 5

C=cost (£)

n=number of miles travelled

Calculate the cost of a journey that is 25 miles.

Show your working out and write the answer in the box below.

cost of journey of 25 miles = £ 17.5

Step-by-step explanation:

Base on the equation the cost of the journey can be represented as

C = 0.5n + 5

where

C = cost in £

n = number miles covered

To calculate the cost of a journey that is 25 miles we have to insert the value of n as 25 in the equation. Therefore,

C = 0.5n + 5

n = 25

C = 0.5 (25) + 5

C = 12.5 + 5

C = £ 17.5

cost of journey of 25 miles = £ 17.5