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Ymorist [56]
3 years ago
10

the first row the theater has 15 seats in it each subsequent row has 3 more seats that seats that the previous ow . if the last

row has 78 sears, how many rows are in the theater a 21 b 78 c 77 d 45 e 22
Mathematics
1 answer:
ivann1987 [24]3 years ago
7 0

Answer:

21 rows

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Let's find the solutions for the quadratic equation:

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Using the quadratic formula, we have:

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x₂ =  [ 9 - √ (105]/2

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