This time I cannot tell what the answer is

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)

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Which number line represents the solution set for the inequality -1/2x> 24?