Answer:
[tex]135[/tex]Explanation:
Here, we want to know the number of seats that will be on the 6th row
The 6th row is simply 5 rows ahead of the first row
Since each row is 3 seats more than the last, we have the recursive formula as:
[tex]a_n\text{ = a}_{n-1}\text{ + 3}[/tex]where:
an is the current row
an-1 is the row before the current
Finally, we have the number of seats as follows:
[tex]\begin{gathered} a_1\text{ = 120} \\ a_2\text{ = 120 + 3 = 123} \\ a_3\text{ = 123 + 3 = 126} \\ a_4\text{ = 126 + 3 = 129} \\ a_5\text{ = 129 + 3 = 132} \\ a_6\text{ = 132 + 3 = 135} \end{gathered}[/tex]This means that, on the 6th row, we would have 135 seats
