What shape has 4 sides that are different lengths

Me with this one question, and i'll upvote the brainliest answer

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

Which linear function represents the line given by the point-slope equation y + 1 = –3(x – 5)?