Its 10 because if you do 1/2 plus 1/2 and so one till you get 5 it is ten
-4.2, -4 1/2, -4.7, -5 1/4, -5.5
The total length of wall is 160 inches
<em><u>Solution:</u></em>
Given that,

1 feet = 12 inches
Therefore,

There are 20 bricks lined up end to end to make the wall
<em><u>To find: Total length of wall in inches</u></em>

Thus we get,

Thus total length of wall is 160 inches