Need help with this problem I'm confused and haven't got it right past attempts

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Atransformation t : (x, y) (x-5,y +3) the image of a(2,-1) is

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?