I need help with this world problem. Really don\'t see how to findthis world, it

Question

I need help with this world problem. Really don't see how to findthis world, its a composite function type of word problem, pleasebreak down step by step if you can guys thnx:
An airline charter service charges a fare per person of $200plus $30 for each unsold seat. The airplan holds 200 passengers.Let x represent the number of unsold seats and write an expressionfor the total revenue R for a charter flight.
An airline charter service charges a fare per person of $200plus $30 for each unsold seat. The airplan holds 200 passengers.Let x represent the number of unsold seats and write an expressionfor the total revenue R for a charter flight.

Explanation / Answer

$200 per passenger $30 per unsold seat number of unsold seats = x total revenue from unsold seats = $30x number of sold seats = (200 - x) total revenue from sold seats = $200 (200 - x) Total revenue = 30x + 200 (200-x) = 30x + 40000 - 200x = 40000 - 170x

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