Saturday

February 28, 2015

February 28, 2015

Posted by **mary** on Sunday, April 18, 2010 at 3:24pm.

- math -
**Reiny**, Sunday, April 18, 2010 at 3:37pmlooks like an arithmetic series where

a = 10, d=2 and n=30

sum(30) = (30/2)[2(10) + (29)(2)]

= 15[20+58] = 1170

(using the standard formula for the sum of n terms)

**Answer this Question**

**Related Questions**

math - Determine the seating capacity of an auditorium with 10 rows of seats if ...

Math - An auditorium has 30 rows of seats. It has 20 seats on the first row, 24 ...

Math - An auditorium has 50 rows of seats. The first row has 20 seats, the ...

Math - an auditorium has 50 rows of seats. THe first row has 20 seats, the row ...

math - An auditorium has 49 rows of seats. The first row contains 40 seats. As ...

Math - An auditorium has 30 rows with 10 seats in the first row, 12 in the ...

math- Algebra 2 - An auditorium has 49 rows of seats. The first row contains 40 ...

arithmetic - An auditorium has 20 rows of seats.These are 20 seats in the first ...

maths - seats are arranged in rows in a auditorium.each row has 5 more than the ...

math (plz help) - In a movie theater, theater A has 30 seats in the first row. ...