Which of the following is the rule for rotating the point with coordinates (x, y), 180° clockwise about the origin?

  A.  (x, y) ⇒ (-x, -y)

Step-by-step explanation:

Rotation 180° in either direction is equivalent to reflection across the origin, and/or reflection across both axes (in either order). It negates both coordinates.

  (x, y) ⇒ (-x, -y) . . . . rotation 180°

what

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

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