Mathematics, 13.12.2019 12:31, sil91

Mary has rehearsed her ballet solo for five and a half hours. a week from now, she wants to have rehearsed at least a total of nineteen and a half hours. if she rehearses for the same amount of time each day for the next 7 days, at least how many hours must she rehearse per day?

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Mary has rehearsed her ballet solo for five and a half hours. a week from now, she wants to have reh...