What two things must a sewage system do?

Hurry: the angle measures associated with which set of ordered pairs share the same reference angle? (-square-root 3/2, 1/2) , (-1/2, -square-root 3/2) (1/2, -square-root 3/2) , (-square-root 3/2, 1/2) (-1/2, -square-root 3/2), (1/2, square-root 3/2) (square-root 3/2, 1/2) , (1/2, square-root 3/2)

What is tge speed of sound in dry air at 0°c

Assume you wanted to save 2000 to buy a used car 18 months from now. how much money do you need to save every week to accomplish your goal?