Answer:
20 yards.
Explanation:
We have been given that Doreen uses 8 yards of fabric to make 2 costumes.
Let us find the fabric used to make one costume by dividing 8 by 2.


As Doreen uses 4 yards of fabric to make each costume, let us multiply fabric used to make each costume by 5 to find the fabric needed to make 5 costumes.



Therefore, Doreen will use 20 yards of fabric to make 5 costumes.