Question

A new movie theater has stadium seating. The first row has 10 seats. Each additional row has 4 seats more than the row before it. How many seats are in the theater if there are 16 rows of seats?

Answer 1

This is an arithmetic progression
So the first row has 10
The 16th row should have 10+4(15)=70
Total=(16/2)(10+70)=640

Answer 2

thanks!

Answer 3

No problem

Answer 4

so i was right :) : 16 x 4 = 64 x 10 = 640 seats

Answer 5

I don't even know you and your starting with me? -_-