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-BARSIC- [3]
3 years ago
5

A stadium has 55000 seats in total. Seats in section A sell for $30, $24 in section B, and $18 in section C. The total number of

seats in section A equals the total number of seats in sections B and C. The stadium takes in $1,405,200 on a sold out night. How many seats does each section hold?
Mathematics
2 answers:
Verizon [17]3 years ago
5 0

Answer: A = 27,500, B = 14,200, C = 13,300

Step-by-step explanation:

A = B + C

55,000 = A + B + C

30A + 24B + 18C = 1,405,200

Substitute #2 with A from #1

55,000 = B + C + B + C or 2B + 2C

Now substitute A for #3

30(B + C) + 24B + 18C = 1,405,200

30B + 30C + 24B + 18C = 1,405,200

54B + 48C = 1,405,200

Now multiply are new #2 equation by -24

(2B + 2C = 55,000)*-24

-48B + -48C = -1,320,000

Combine this equation to our new #3

[-48B + (-48C) = -1,320,000] + [54B + 48C = 1,405,200]

6B = 85,200

B = 14,200

Now that we got B we have to continue...

Substitute B in our new #2

2(14,200) + 2C = 55,000

Solve.

28,400 + 2c = 55,000

                     -28,400

2c = 26,600

C = 13,300

Now we can use #1

A + 14,200 + 13,300 = 55,000

A + 27,500 = 55,000

                     -27,500

A = 27,500

(There's also a much simpler way... Divide 55,000 in half to get A automatically.)

kolezko [41]3 years ago
4 0

Answer:

A= 27500 seats, B= 14200 seats, C= 13300 seats

Step-by-step explanation:

a=b+c

a+b+c=55000 seats

30a+24b+18c=1405200 dollars

substitue a for b+c

b+c+b+c=55000

30(b+c)+24b+18c=1405200

seats 2b+2c=55000 --> divide by 2 on both sides b+c=27500 --> c=27500-b

dollars 30b+30c+24b+18c=1405200 --> 54b+48c=1405200 divide by 6 --> 9b+8c=234200

substitute c for 13750-b

9b+8(27500-b)=234200

9b+220000-8b=234,200

b=14,200 seats

c=27500-b=27500-14200=13300 seats

a=55000-b-c=55000-27500=27500 seats

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