



 
Hi Joe, The length plus the width is the distance half way around the rectangle so \[\mbox{length } + \mbox{ width } = 9.\] The area of a rectangle is the length times the width so \[\mbox{length } \times \mbox{ width } = 20.\] Hence the question is asking, do you know two number with their sum equal to 9 and their product equal to 20. Penny  


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