Discover Questions

Explain how you got the answer and the steps please? Are rocks stones or are stones rocks? What is the de Broglie wavelength, in cm, of a 12.4−g hummingbird flying at 1.20 × 102 mph? (1 mile = 1.61 km.)? How do I eliminate the parameter in these problems? Put the following equations into an augmented matrices form:
4x + 3y – z = 19 x – 4y + 3z = 50 3x + y + 12z = 7?