Asked by Emily

An auditorium has 50 rows of seats. The first row has 20 seats, the second row has 21, the third row has 22 seats, and so on, each row having one more seat than the previous row. How many seats are there all together?
a. write 2 different expressions for the total number of seats in the auditorium. One expression should use addition: the other should involve multiplication. Write an equation that uses these two expressions.
b. Solve the auditorium problem, explaining your reasoning.

Answers

Answered by Reiny
Your problem is dealing with an arithmetic series, where
a=20 , d=1, and n = 50
Sum(n) = n/2[2a + (n-1)d]
= 25[40 + 49(1)]
= 2225

Answered by sherri
what are two different expressions for the total number of seats in the auditorium
Answered by Heather
2225
Answered by ...
wrong though
^^^
Answered by Person B
Its pretty difficult. Not an answer just a comment.
There are no AI answers yet. The ability to request AI answers is coming soon!

Related Questions