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September 1, 2015

Homework Help: maths

Posted by Anonymous on Sunday, February 21, 2010 at 8:00am.

A brick wall is built by using 2 bricks less in each layer than in the previous one. The wall has m layers and in total 21m+40 bricks are used. If the top layer has only 4 bricks, determine:A) the value of m
b) the total number of bricks in the wall

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