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A classroom has stadium seating. There are 10 seats in the first row, 13 seats in the second row, 16 seats in the third row and so on. There are 56 rows. What is the seating capacity of the class?
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A classroom has stadium seating. There are 10 seats in the first row, 13 seats in the second row, 16 seats in the third row and so on. There are 56 rows. What is the seating capacity of the class?

User Oorang
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1 Answer

4 votes
Use the equation:

y = 3x + 7

(plug 56 in for the x and then solve)

Answer will be: 175
User Elvin
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