Assuming you meant:
The taxi firm charges £3.00 standing charge, plus 50p per mile. How much will it cost Jenny to travel 8 miles?
Then the answer would be,
50p (per mile) x 8 (miles) = £4.00.
£4.00 + £3.00 (S.O) = £7.00.
Therefore, the whole journey will cost Jenny £7.00.
-Hope this is what you were looking for, if not sorry.
