Question
Warren jogged for 4 days. On each day, he would do 5 more rounds than the previous day. He did c number of rounds on the first day. What was the total number of rounds he did for the 4 days? Give your answer in terms of c.
2 m

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Warren jogged for 4 days. On each day, he would do 5 more rounds than the previous day. He did c number of rounds on the first day. What was the total number of rounds he did for the 4 days? Give your answer in terms of c.