Mathematics, 30.10.2019 22:31 dakotaadkins20

Roscoe must play 11 commercials during his 1-hr radio show. each commercial is either thirty seconds or sixty seconds long. if the total commercial time during that hour is 9 minutes, how many commercials of each type does roscoe play?

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Roscoe must play 11 commercials during his 1-hr radio show. each commercial is either thirty seconds...

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