Respuesta :
Answer:
31x - 35
Step-by-step explanation:
The n th term of an arithmetic sequence is
[tex]a_{n}[/tex] = a₁ + (n - 1)d
where a₁ is the first term and d the common difference
d = 5x - 9 - (3x - 7) = 5x - 9 - 3x + 7 = 2x - 2 and a₁ = 3x - 7, thus
[tex]a_{15}[/tex] = 3x - 7 + 14(2x - 2) = 3x - 7 + 28x - 28 = 31x - 35
