shiannethorn
24.11.2020 •
Mathematics
A large multiplex movie house has many theaters. The largest theater has 35 rows. There are 13 seats in the first row. Each row has two seats more than the
previous row. How many total seats are there in this theater?
There are
seats in the theater
Solved
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Ответ:
There are 1645 seats in the theatre.
Step-by-step explanation:
The first row has 13 seats and each row has 2 seats more than the previous one which means
13,15,17...
As the terms are increasing with the same difference, d=2 this forms an arithmetic sequence.
where
The rule for an arithmetic sequence is given by:
Putting the value of a1 and d
We have to find total seats in the theatre for that the 35th term of sequence is required as their are 35 rows.
So,
Putting n=35
Now we need to find the sum of the 35 terms
The formula for sum of arithmetic sequence is:
Hence,
There are 1645 seats in the theatre.
Ответ:
They would be Equal
Step-by-step explanation:
if we split a rectangle into two triangles it would be the same triangle just flipped!