The additive inverse of x is -x, as x-x=0, as 0 is the additive identity element.

For $600, they dropped an obese white oak that was lurching after my roof deck, two poplars and a diseased maple, plus three more loblolly pines.

After harmony was introduced into music during the late Middle Ages, major and minor triads emerged as the principal chords. The major triad, as C E G, was regarded with especial favor, because it occurs naturally in the harmonic series, as on bugles, and can be expressed by the simple ratios, 4:5:6. A system of tuning for the diatonic scale known today as just intonation gained support in the 16th century, because its principal triads, C E G, F A C, and G B D, had these just ratios. But an important minor triad, D F A, is harsh in just intonation, and other unsatisfactory triads result when this tuning is extended to the complete chromatic scale.

While reviewers were lukecool (38% on Rotten Tomatoes), Cirque du Freak did make money for Universal Pictures. The film, based on graphic novels by Darren Shan, yielded $14 million domestically and nearly $40 million worldwide.