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Mathematics, 09.12.2020 21:40 cashhd1212

Casey started a puzzle yesterday and completed 63 of the pieces. Today, he is continuing the puzzle and is laying down the pieces at a constant rate. After 13
minutes, he now has 115 pieces put together. After 21 minutes, he has 147 pieces in
total put together. At what rate is he putting this puzzle together today?
7 pieces/min
2 pieces/min
4 pieces/min
9 pieces/min

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