Answer:
C I think.
Step-by-step explanation:
I don't know for sure, but A, B and D all talk about adding or subtracting the answers together, while C tells us to find the fraction of a fraction so I'm pretty sure you multiply. Hope this helps!
The 1st problem it is the Last Graph
The 2nd problem it is the First Graph
4th option: a= 12ft, b= 12ft
Please see attached picture for full solution.
-5
15-20