It's 3.
3‚354‚107
..................
Let's take any edge length l. The diagonal has length

. In our case it's
B + (-2) = 0
Here, we need to do the inverse operation, and apply it to BOTH sides of teh equation.
b -2 = 0
+2 +2
b = 2
Now we have our answer, b = 2
Final answer: b = 2
I believe the answer would be 2 23/42. Sorry, if I am wrong with this answer. Sorry, i also mean the answer should be actually 1 3/7
Answer:
-1
Step-by-step explanation:
8+9=17
9+8=17
17-8=9
17-9=8
But, 8-9 is -1