Question 4588
Let L=Length of thread on a bolt
Let D=Diameter
So we can write the length of the thread on a bolt is equal to twice the diameter + 1/4" as:
{{{L=2D+1/4}}}

If D={{{1/2}}}, then
{{{L=2(1/2)+1/4}}}
Clear the parentheses and combine like terms:
{{{L=1+1/4}}}
{{{L=5/4"}}}

The thread is 5/4 inches in length