Mathematics, 11.01.2020 00:31 lannor6586

Todd has 21 white tiles dnd some black tiles to make a mosaic. the mosaic has a total area of 144 square centimeters. each tile has an area of 3 square. how many black tiles did todd use?

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Todd has 21 white tiles dnd some black tiles to make a mosaic. the mosaic has a total area of 144 sq...