A polyhedron has 9 faces and 21 edges. how many vertices does it have
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The answer is $162 you take the prices of what she bought and add them together which is $73+$38+$64=$180
then you subtract the $180 from $342 which is $342-$180=$162
so the answer is $162
then you subtract the $180 from $342 which is $342-$180=$162
so the answer is $162