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:
Y=6
Step-by-step explanation:
Just equate both to each other and you get:
<span>x + 1 = y = 4x + 5
Leave out the y, and you get
</span>x + 1 = 4x + 5
That was I believe your first option.
You can now work out x:
-3x = 4 => x = -4/3
7x-3y=15 is the equation in standard form.
Hey there!
squared would equal = 4096.
Your correct answer would be
. . .
Hope this help you.
~Jay
