<h2>
Answer:</h2>
<h2>
Step-by-step explanation:</h2>
If resistors are in series, so the current is the same in all of them. In this problem we have four resistors. So, we can get a relationship between the Equivalent resistance of series combination and the four resistors as follows:
is the total resistance . Moreover:
Therefore:
The answer is
-5/8+9/2=3 7/8 or 31/8
so you should put 31 in the green box
hope this helps :)
your question helped me and so ill help you