In the eighth grade, 1 math whiz < 1 popular boy, according to Tess"s calculations. That is, until she has to factor in a few more variables, like: 1 stolen test (x), 3 cheaters (y), and 2 best friends (z) who can"t keep a secret. Oh, and she can"t forget the winter dance (d)! Then there"s the suspicious guy Tess"s parents know, but that"s a whole different problem. Can Tess find the solutions?