Solve the Problem $R ( x ) = ( 125 - x ) ( 350 + 20 x )$

Multiple Choice

Solve the problem.
-An airline charter service charges a fare per person of $350 plus $20 for each unsold seat. The airplane holds 125 passengers. Let x represent the number of unsold seats and write an expression for the total revenue R for a
Charter flight. A) $R ( x ) = ( 125 - x ) ( 350 + 20 x )$ or $43,750 + 2,150 x - 20 x ^ { 2 }$
B) $R ( x ) = 125 ( 350 + 20 x )$ or $43,750 + 2,500 x$
C) $R ( x ) = x ( 350 + 20 x )$ or $350 x + 20 x ^ { 2 }$
D) $R ( x ) = ( 125 - x ) ( 350 + 20 x )$ or $43,750 + 2,500 x - 20 x ^ { 2 }$