Plzs math problem im failing shcool

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.

Select the conic section that represents the equation. 3x2 + 3y2 -2x + 4 = 0

The girls swim team is hosting a fund raiser. they would like to raise at least $500. they are selling candles for $5 and flower arrangements for $6. the girls estimate that at most they will sell 200 items.