Should the US have joined WWII?

What explains the political difference among african americans politicians during reconstruction

Will give brainlist need this answer asap which of the following groups made up the majority of those involved in the progressive movement? a) politicians b) farmers c) middle class d) factory worked

The hypotenuse of a 45 -45 -90 triangle measures 7\2 units. what is the length of one leg of the triangle