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Naddik [55]
3 years ago
9

the ratio of the number of adults to the number of students at the prom has to be 1:10. Last year there were 477 more students t

han adults at the prom. If the school is expecting the same attendance this year, how many adults have to attend the prom?
Mathematics
1 answer:
Alexeev081 [22]3 years ago
6 0
Ratio:\ \ \frac{1}{10}\\\\x-number\ of\ adults\\477+x-number\ of\ students\\\\If\ ratio\ is\ \frac{1}{10}, for\ 1\ adult\ is\ 10\ students.\ So\ for\ x\ adults\ is\ 10x\\students.\\\\10x=477+x\ \ \ \ \ \ |substract\ x\\10x-x=477\\9x=477\ \ \ \ |:9\\x=53\\\\10x=10\cdot53=530\\\\There\ were\ 53\ adults\ and\ 530\ students.
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Step-by-step explanation:

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2 years ago
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