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July 30, 2014

July 30, 2014

Posted by **karen** on Friday, November 21, 2008 at 6:02pm.

- college algebra -
**Reiny**, Friday, November 21, 2008 at 6:17pmlisa's rate = drive/50

Jim's rate = drive/55

combined rate = drive/50 + drive/55

= 21drive/550

so time = drive/(21drive/550) = 26 minutes

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