Mathematics, 23.09.2019 08:50, Rodriguezi4971

For every 3 hours that juan spends practicing the violin he practices the cello for 2.5 hours. nina is learning to play the viola and cello. for every 3 hours nina spends practicing the viola she practices the cello for 2 hours. if juan practiced the violin for 9 hours last week and juan and nina practiced the cello for the same amount of time, then nina practiced the viola for last week.

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For every 3 hours that juan spends practicing the violin he practices the cello for 2.5 hours. nina...