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OpenStudy (anonymous):
Please help! I will medal! The ratio of girls to boys who participated in the quiz bowl was 7:5. There were 42 girls in the competition. How many boys participated? A) 28 B) 30 C) 35 D) 49
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OpenStudy (amistre64):
you have a ratio of girls:boys 7n : 5n when 7n=42, what does 5n equal?
OpenStudy (anonymous):
22?
OpenStudy (amistre64):
not quite, solve for n to determine whnat 5n would be
OpenStudy (anonymous):
28?
OpenStudy (amistre64):
or we could just solve the setup: 7/5 = 42/b using cross multiplication
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OpenStudy (anonymous):
|dw:1418673381549:dw|
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