She will pay for a journey of 20 kilometers.
We have given that,
The fixed price of a taxi journey costs $11.50 plus $5 per traveled kilometer.
We have to determine How much will you pay for a journey of 20 kilometers.
We have $11.5 fixed.
We have to determine for 20km we have to pay.
20k * $5 = $100
$100 + 11.5 = 111.5
Therefore she will pay for a journey of 20 kilometers.
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