In the grid below, points A and B have been rotated 90° counterclockwise around the origin. Give their image coordinates.

Step-by-step explanation:

4). Rule for the rotation by 90° counterclockwise about the origin is,

   (x, y) → (-y, x)

   For the given coordinates,

  A(1, 3) → A'(-3, 1)

  B(5, 6) → B'(-6, 5)

5). Rule used in question (4) is,

  (x, y) → (-y, x)

  Option (4) will be the correct option.

6). Coordinates of point C(2, 8) by rotation of 90° counterclockwise about the origin will be,

   C(2, 8) → C'(-8, 2)

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or