Help me asap failing lol and don’t mind my ugly teacher in the back ..

Asap (explain how you got it as well for brainliest)i tried 1: 2 and 2: 3 and they were wrong. picture of figure: in the figure below, the segment is parallel to one side of the triangle. the ratio of 12 to y is1: 21: 31: 42: 3

(hurry! ) which expression is equivalent to the following complex fraction?

Which of the following circles have their centers in the third quadrant?