Mathematics, 15.07.2021 20:30 joha222680
There are 25 rows of seats in the high school auditorium with 20 seats in the first row, 21 seats in the second
row, 22 seats in the third row, and so on. How many total seats are in the auditorium?
OA) 800 seats
OB) 860 seats
Answers: 2
, where 
is the number of terms, 
is the first term, and 
is the last term
, 
, and 
, we get:
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There are 25 rows of seats in the high school auditorium with 20 seats in the first row, 21 seats in...
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