Mathematics, 23.07.2019 18:30, renee9913

Nina glues pictures on a rectangular piece of cardboard. the piece of cardboard is 20 inches long and 9 inches wide. each rectangular picture is 7 inches long and 4 inches wide. she glues 3 pictures on the cardboard. the pictures do not overlap. what is the area of the cardboard that is not covered by pictures?

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Nina glues pictures on a rectangular piece of cardboard. the piece of cardboard is 20 inches long an...