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Mathematics, 31.07.2019 07:00 lisnel
Mr. cringle found a box of handmade holiday greeting cards in his garage and decided to make more to send to all his friends. after 2 hours had passed, mr. cringle had a total of 30 cards. after 6 hours had passed, he had a total of 40 cards. at what rate is mr. cringle making greeting cards and how many cards were in the box he found?
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