Answer:
It will cost Jenny £434 to travel 8 miles.
Step-by-step explanation:
You can use the expression 3 + 50m
3 is the base cost, 50 is the price per mile, m.
Considering you need to find how much it will cost Jenny for 8 miles, you can substitute 8 for m, giving you 3 + 50(8).
Solving through:
3 + 50(8)
3 + 400 = 434
This means it will cost Jenny £434 to travel 8 miles.