Answer:
1083 seats
Step-by-step explanation:
this is an arithmetic sequence :
an = an-1 + c
in our case
a1 = 10 (10 seats in the first row)
a2 = a1 + 1 = 10 + 1 = 11
a3 = a2 + 1 = a1 + 1 + 1 = 10 + 1 + 1 = 12
an = an-1 + 1 = a1 + (n-1)×1 = a1 + n - 1 = 10 + n - 1 = 9 + n
a38 = a1 + 37 = 10 + 37 = 47 seats.
altogether this means the sum of the arithmetic sequence of a1 to a38.
the general sum of an arithmetic sequence from a1 to an is
n×(a1 + an)/2
in our case
38×(10 + 47)/2 = 19×57 = 1083 seats
Answer:
9.31st 91 35 5789 400th
Step-by-step explanation:
43.45+567=
9.3
Decimal form: -2.6666..
Fraction form: -2 2/3
Answer:
EF = 19
Step-by-step explanation:
EF = (23 + 15)/2 = 19
Answer:
1 out of 6
Step-by-step explanation:
So basically the shortest is one person in the group of six aand 1/6 cant be simplified so yeah
