Question

550= 0.25a + 0.745b 560= 0.25a + 0.8b​

Answer 1

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what we have to do in it

There were quite a few causes of the first world war (WW1). The long-term causes were the militarism, alliance system, imperialism and nationalism- MAIN. The short-term cause was the fact that Austria-Hungary blamed Serbia for killing Archduke Franz Ferdinand and his wife.