Prove or disprove: every subgroup of the integers has finite index.

Find an equation in standard form of the parabola that passes through (-2, 9), (-4, 5), and (1, 0)

Iknow this isn't a question, but is there someway to ask a question under public safety or is there no category for it? i don't know if i'm overlooking it or not.

Which group of college students is typically offered scholarship? a. freshmen, sophomores, and juniors. b. biology, english, and engineering majors. c. hard workers, part-time students, and out of state students. d. first time freshmen, current students, and transfer students.