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OpenStudy (anonymous):
A farmer has some goats and hens on his farm. They have a total of 99 heads and legs. There are twice a many hens as goats. How many hens are there?
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OpenStudy (anonymous):
hello charmz
OpenStudy (anonymous):
hey
OpenStudy (anonymous):
Given a + b + c = 5 and a² + b² + c² = 9, find the value of ab + ac + bc
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