To factor the expression \( 35x - 40 \) completely, we first find the greatest common factor (GCF) of the two terms.
The GCF of \( 35x \) and \( 40 \) is \( 5 \).
Now we can factor out \( 5 \):
\[ 35x - 40 = 5(7x - 8) \]
Therefore, the completely factored form of the expression is:
\[ 5(7x - 8) \]
So the correct response is:
5(7x−8)