What form(s) of documentation is (are) required in all assignments using outside sources?

Find the center and the radius of the circle with the equation: x^-2x+y^2+4y+1=0

Read the sentence from susan b. anthony's "on women's right to vote." hence, every discrimination against women in the constitutions and laws of the several states is today null and void, precisely as is every one against negroes. in this sentence, the author's tone is best described as

Make a story with words noodle saddle juggle riddle uncle throttle miracle muscle obstacle example