Jake has started an exercise program. Each day he increases the number of sit-ups that he does by a constant amount. On day one,

Question

Jake has started an exercise program. Each day he increases the number of sit-ups that he does by a constant amount. On day one, he did 7 sit-ups. In the following three days he did 9, 11, and 13 sit-ups, respectively. On what day will he do 81 sit-ups? O
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Kunduz · Accepted Answer

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