Well, if you need to solve for f, then..
b-2f=2f-2f+6
b-2f=6
b-b-2f=6-b
-2f=6-b
-2f÷-2=6÷-2-b÷-2
f=-3-1/2b
Sqrt 18, 41/9, 4.556, 4.56, then lastly 4 5/8. Hope this helps!
This question is flawed. I believe it was meant to ask: "If you ask a random person <span>who identifies as American</span> this question, what is the probability?" etc. Assuming this is the case, it would be 93% probability.
Otherwise, America is equivalent to 4.34% of the total world population as of Thursday, April 6, 2017 (http://www.worldometers.info/world-population/us-population/). So, 7% of 4.34% is 0.3%.
I'd stick to 93%
B:
Explanation that equation is the B
