Yangyang080808idn
Answered

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1 An auditorium has 10
seats in the first row and
2 additional seats in each
successive rows. If there
are 25 rows, how many
seats are in the last row?
How many seats are in
the auditorium​

Sagot :

RobbieRavenclawidn

Answer:

There are 58 seats in the last row.

Step-by-step explanation:

Given:   [tex]a_1=10[/tex],   [tex]d=2[/tex],   [tex]n=25[/tex]

Find:   [tex]a_{25}=?[/tex]

Formula:   [tex]a_n=a_1+(n-1)d[/tex]

Solution:

[tex]a_n=a_1+(n-1)d\\a_{25}=10+(25-1)2\\a_{25}=10+(24)2\\a_{25}=10+48\\\boxed{a_{25}=58}[/tex]

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