Answer:
 6 feet of pipe does he have
Explanation:
Let one length be A and other length be B
As per the statement:
Brad has two lengths of copper pipe to fit together. one has a length of 2 5/12 feet and the other has a length of 3 7/12 feet. 
⇒A = 
 and 

We have to find how many feet of pipe does he have.
Total length of pipe does he have = A+B
⇒
 feet.
Therefore, 6 feet of pipe does he have