there are 21rows of seats in an auditorium The first row is of 20 seats,the second of 22 seats, third of 24 seats,and so on.How many chairs are there in the 21st row
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Answered by
1
Answer:
sorry friends I didn't know
Step-by-step explanation:
sorry
Answered by
1
Answer:
60 seats
Step-by-step explanation:
a1=20
n=21
d=2
a(n)=a+(n-1)d
a21=20+(20)2
a21=60
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