Can someone please help me with this problem?

A theater has 25 rows of chairs. The first row has 18 chairs, the second has 22, the third has 26, and so on. In total, the theater seats _____ people.

Question

Can someone please help me with this problem?

A theater has 25 rows of chairs. The first row has 18 chairs, the second has 22, the third has 26, and so on. In total, the theater seats _____ people.

anonymous · Answer

I got 1650... is that correct? Please let me know! :)

anonymous · Answer

or would this be 825??

anonymous · Answer

did you use a formula like n(n+2)? where n would be 25... i'm not sure if it;s right but it might be..... what do you think?

anonymous · Answer

I ended up trying it out the long way because I don't know how to do the formula :(

anonymous · Answer

ouch.... :) well i mean i kinda read it somewhere but if you think about what is the similarity between the number of seats in the first, second, and third row?