By rename do you mean turn into an improper fraction?
if so, it is because without turning it into an improper fraction, you cannot subtract 3/4 from 1/4 because you would get a negative answer and that would be incorrect
Researchers found a total of 138 volcanoes in the West Antarctic Ice Sheet overlying the West Antarctic Rift System, 91 of which had never before been identified. Basically they have never seen those types of volcanoes before.
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what's all the meaning of this
Just took the test and figured out the answer was A. Hoped I helped you and everyone else reading this.
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lol chad its probably A if i can see your question ill be able to answer but ofcourse hope this helps?
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