Please help out! need asap<3

Which of the following transformations does not preserve congruence? * 5 points a. (x, y) → (y − 3, x − 3) b. (x, y) → (x + 5, y − 1) c. (x, y) → (y + 9, −x + 2) d. (x, y) → (3x + 1, 3y − 2)

Which value of c would make he following expression completely factored? 8x+cy

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?