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olchik [2.2K]
3 years ago
15

The Family Fine Arts Center charges $21 per adult and $13 per senior citizen for its performances. On a recent weekend evening w

hen 535 people paid admission, the total receipts were $8355. How many who paid were senior citizens?
I am struggling with the right formula to use.
Do I use an arthimetic or geometric sequence?
Mathematics
1 answer:
uysha [10]3 years ago
3 0

Answer:

175 adults

360 senior citizens

Step-by-step explanation:

Let x be the number of senior citizens

There were a total of 535 people, so

(535-x)=total number of adults

Total receipts=$8,355

Adult payments+Senior payments=$8,355

21(535-x)+13x=$8,355

$11,235-21x+13x=$8,355

$11,235-8x=$8,355

-8x=$-2,880

x=360 senior citizens

Number of adults=535-360=175 adults

To check, just substitute...

21(175)+13(360)

3,675+4,680

Which equals.....

$8,355

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