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OpenStudy (anonymous):
y varies directly with x. When y=20, x=50. Find x when y=36. 105 90 80 75 I think its 90.
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OpenStudy (saifoo.khan):
Use a shortcut.
OpenStudy (anonymous):
okay...
OpenStudy (saifoo.khan):
Use the simple ratio method.
OpenStudy (anonymous):
tell me more?
OpenStudy (saifoo.khan):
y : x 20 : 50 36 : x Cross multiply.
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OpenStudy (anonymous):
20/50=.4 36/.4=90 You are right
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