To rent a banquet hall for a school function, it costs $550 to book the hall for one night in addition to a non-refundable $25 administrative fee, along with a charge of $5 per person attending the event. Write an equation that represents the total cost of renting the banquet hall for an event.
What will be the total cost to rent the hall if 200 people attend?

f is the midpoint of

what is the question? i am guessing you are looking for the area.

to find an area, you have to do length x width.

in this case, it would be 12 ft x 4 ft = 48 sq. ft

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).