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275/20 simplified (lmbo it told me to add more characters)

Two rigid transformations are used to map abc to qrs. the first is a translation of vertex b to vertex r. what is the second transformation? a reflection across the line containing ab a rotation about point b a reflection across the line containing cb a rotation about point c

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.