Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- anonymous

Can some explain to be on what to do with a question like this:
Suppose a movie theater has 42 rows of seats and there are 29 seats in the first row. Each row after the first has 2 more seats than the row before it. How many seats are in the theater?

Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions.

Get your **free** account and access **expert** answers to this and **thousands** of other questions

- anonymous

- katieb

See more answers at brainly.com

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- anonymous

I know it's using gemoetric or arithmetic stuff

- anonymous

ok. so can u tell me how many seats in the second row?

- anonymous

31 right?

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- anonymous

first row has 29 common difference is d=2, your a=29 , d=2
therefore in 42 rows
there are total of
\[Sn=\frac{ n }{ 2 }(2a+(n-1)d)=\frac{ 42 }{ 2 }(2*29+(42-1)2)\] you can calculate now

- anonymous

it should be 2940 seats

- anonymous

yea. 29 + 2
and in the third its 29 + 2 + 2 = 29+4
in the fourth, it is 29 + 6
and so on...
so the nth row would contain 29 + (n-1)*2
This is the general term of an A.P.
and you are asked to find the sum of the first 42 terms.

- anonymous

Dang that's alot of seats,and yeah I calculated that! Thank you..

Looking for something else?

Not the answer you are looking for? Search for more explanations.