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tamaranim1 [39]

2 years ago

13

A theater has 10 seats in the first row and 30 seats in the 6th row. How many seats are in the 11th row?

1 answer:

boyakko [2]2 years ago

5 0

Find the difference per row:

10 seats in the first row

30 seats in the sixth row:

30 -10 = 20 seats difference.

6-1 = 5 rows difference.

20 seats / 5 rows = 4 seats per row.

This means for every additional row, there are 4 more seats per row.

The equation would be:

Sn = S +(n-1)*d

Where d is the difference = 4

S = number of seats from starting row = 10

n = the number of rows wanted

S(11) = 10 + (11-1)*4

S(11) = 10 + 10*4

S(11) = 10 + 40

S(11) = 50

Check:

Row 6 = 30 seats

Row 7 = 30 + 4 = 34 seats

Row 8 = 34 + 4 = 38 seats

Row 9 = 38 + 4 = 42 seats

Row 10 = 42 + 4 = 46 seats

Row 11 = 46 + 4 = 50 seats.

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I suppose you mean

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3 years ago

A game has a circular playing area in which you must hit a ball into a circular hole. The area of the playing area is 16ft2. The

Bad White [126]

Answer:

$4.9\%$

Step-by-step explanation:

we know that

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The area of the circle (hole) is equal to

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we have

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assume

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substitute

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substitute

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Eddi Din [679]

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3 years ago

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Tems11 [23]

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3 years ago

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xz_007 [3.2K]

Answer:

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