Answer: 12.5
Step-by-step explanation:
The w/4 term is the same as (1/4)w or 0.25w since 1/4 = 0.25
Because a variable is attached to this term, it is not constant. The same can be said about the -7z term as well.
The 12.5 is constant. It never changes. It will always be 12.5 no matter what the other variable terms change to.
For example, if w = 12, then the term w/4 becomes 12/4 = 3. Or if w = 24, then w/4 = 24/4 = 6 is the new value. This shows that term changing depending on the input variable.