Respuesta :

mhanifa

Answer:

  • 42 seats

Step-by-step explanation:

This represents an arithmetic progression with the first term of a = 15 and common difference of d = 3.

The tenth row is the 10th term:

  • aₙ = a + (n - 1)d

The row 10 has:

  • a₁₀ = 15 + 9*3 = 15 + 27 = 42 seats
  • First term=a=15
  • Common difference=d=3

[tex]\\ \bull\tt\dashrightarrow a_n=a+(n-1)d[/tex]

[tex]\\ \bull\tt\dashrightarrow a_{10}=a+9d[/tex]

[tex]\\ \bull\tt\dashrightarrow a_{10}=10+9(3)[/tex]

[tex]\\ \bull\tt\dashrightarrow a_{10}=15+27[/tex]

[tex]\\ \bull\tt\dashrightarrow a_{10}=42[/tex]

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