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