Posted by **Emily** on Sunday, August 16, 2009 at 7:57pm.

Mrs. Smith drove at a rate of 45 mi/h from her home to her sister's house. She spent 1.5 hours having lunch with her sister. She then drove back home at a rate of 55 mi/h. The entire trip, including lunch, took 4 hours. How far does Mrs. Smith live from her sister?

I set it up like this: 45t+55t=2.5 hours

I got she lives 100 miles but I don't know for sure if I did it right. If someone could check my work I would love it. Thanks in advance.

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