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Pearson Algebra 1 Common Core, 2011 View details

8. Unions and Intersections of Sets

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Exercise 42 Page 220

Think of the first set as the x-coordinates and the second set as the y-coordinates.

{ (grape, jam), (grape, juice), (apple, jam), (apple, juice), (orange, jam), (orange, juice)}

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We can think of the first set A as the x-coordinates and the second set B as the y-coordinates. The cross product of two sets A and B is written as A* B, where all elements in A are paired with each element in B in ordered pair form (a,b). A&={ grape, apple, orange} B&={jam, juice} A* B &={ ( grape, jam), ( grape, juice), & ( apple, jam), ( apple, juice), & ( orange, jam), ( orange, juice)}