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July 3, 2015

Homework Help: second grade

Posted by Hailey on Thursday, September 30, 2010 at 9:45pm.

I am having trouble, I have a question I think I got the answer because I kept multiplying and dividing, but I have to show my work but when i try, my answer is not the same.

The question is A traffic light at one intersection changes every 28 seconds and the light at the other intersection changes every 32 seconds. How long until they both change together?

I got every 8 light changes. Can you please help me solve this?

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