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
The sun (solar energy)
The Earth (geothermal) this can also be known as internal
I think it’s A) Volga, I’m sorry if it’s wrong
D. Europe, Africa, and North America were the three continents involved in the Triangular Trade
I believe the second answer is B. Oliver Cromwell, but I am not certain
