Posted by Anonymous on Thursday, November 24, 2011 at 7:01am.
a male black widow spider is half the size of a female black widow spider. together they are 21 millimeter in length. how big is a female black widow

3rd grade math  Writeacher, Thursday, November 24, 2011 at 7:27am
Divide 21 by 3.
The female is 2 of those thirds.
The male is 1 of those thirds.

3rd grade math  izah, Tuesday, November 27, 2012 at 6:15pm
the solution is.......17,
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