graycourtgirl graycourtgirl

06-01-2015
Mathematics

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Eight oranges cost $1.00. How much will 5 dozen oranges cost?

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Аноним Аноним

06-01-2015

5 dozen oranges will cost $7.50. (Each orange costs 12.5 cents)

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07-01-2015

[tex]dozen=12\ \ \ \ 5*12=60\\\\ 8\ oranges\ cost\ 1\$\\ 60\ oranges\ cost\ x\\\\ make\ proportion:\\ 8-1\\60-x\\\\cross\ multiplication\\\\ 8x=60\ \ \ | divide\ by\ 8\\\\ x=7.5\$\\\\5\ dozens\ cost\ 7.5\$\\\\[/tex]

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