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Alex has a rectangular piece of red paper that is 4centimeters wide. It's length is twice it's width.she glues a rectangular piece of blue paper on top of the red piece measuring 3 centimeters by 7 centimeters how many square centimeters of red will be paper will be visible on top

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Answer:

11 square centimeters

Step-by-step explanation:

1. find the area of the red paper

  4 x 8 = 32

2. find the area of the blue paper

  3 x 7 = 21

3. subtract area of the blue paper from area of the red paper

  32 - 21 = 11

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