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OpenStudy (anonymous):
If 5x+x2>100 then x is not 10,8,7,or 9?
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OpenStudy (agent0smith):
Plug each in and check?
OpenStudy (agent0smith):
eg try x=10: 5*10 + 10^2 > 100 true or false? Then check the others
OpenStudy (anonymous):
False
OpenStudy (agent0smith):
Yep, now check the others.. .you can do it in your head even
OpenStudy (anonymous):
Thanks
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