Answer:
Step-by-step explanation:
Hello. Would love to try and help, your screenshot is not showing up when I click on it though.
Dividing fractions is the same as multiplying by its reciprocal so you can change the equation to this

And you can simplify by eliminating the fours and multiplying straight across

You can pull out - 7 from the top and 2 from the bottom so you have this

And then you can cancel out to (2-x) to get an answer of
35714286/1000000000, simplified is <span>17857143/500000000.</span>
Answer: AOB
This is because angle AOB on top adds with BOC down below to get the largest angle AOC. See the diagram below.
58 - its simple- Hope I helped :)