What challenge did Pershing face in 1917

Which one of these were common aspects of war efforts during world war 1 1. rationing 2. war bonds 3. using schools as military facilities 4. child soldiers 5. women working in factories circle all that apply

Jane determines x = 4 and y = 1 is the solution to the following system of equations.

Aclaim about history is most likely not valid if it has which of these characteristics?