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The number of people that enter a contest the first day is 27. 31 people enter the second day and 35 enter on the third day. This pattern continues and the contest lasts 14 days.

What is the total number of people that enter the contest?

 

 

The attendance for the first night of a play is 455. The attendance increases by 16 on each of the next 9 nights.

What is the total attendance for the 10 nights?

jbouyer  Feb 28, 2018
 #1
avatar+87293 
+1

The 14th term is

 

27  + 4(14 - 1)   =  79

 

The sum is given by

 

[ 27 + 79]  * 14/2   =  742

 

 

 

The 10th term  is

 

455 +  16 (10 - 1)   =  599

 

Th sum is given by :

 

( 455 + 599) * 10/2   =   5270

 

 

 

cool cool cool

CPhill  Mar 1, 2018

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