Answer:
I think the third one. 
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Answer:
Find the value of x if B is the midpoint of AC, AB = 2x + 9 and BC = 37
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A ration is basically a fraction. It can be written different ways i.e. 2/3 or 2:3. They are both the same thing. There are 5 girls out of 39 students... ratio= 5/39 or 5:39