A total of 23 rows are required to build a brick wall. The bottom row requires 117 bricks and each successive row requires 2 bricks less than the previous row. i. How many bricks are required for the top row?  ii. How many bricks are required to build the wall?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
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Chapter8: Sequences, Series,and Probability
Section8.2: Arithmetic Sequences And Partial Sums
Problem 72E: A triangular brick wall is made by cutting some bricks in half to use in the first column of every...
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A total of 23 rows are required to build a brick wall. The bottom row requires
117 bricks and each successive row requires 2 bricks less than the previous
row.

i. How many bricks are required for the top row? 
ii. How many bricks are required to build the wall?

 

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