Nine times a number is -63

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)

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?

Given the equation −4  = 12, solve for x and identify if it is an extraneous solution.