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2016-07-23 Geometry - Simultaneous Equations Having Complex Numbers:

Hi Prashant,    Simultaneous equations with complex numbers can be solved using some of the techniques you would use for real systems (substitution, elimination, matrix inversion...).  Just be sure you

2016-07-22 Archaeology - help:

Hi Apsara,    This not an unusual problem.  Many many people have confidence problems going on stage.  Even many actors have difficulty with this.  So it is important to know that you are not alone.  Chances

2016-07-21 Entomology (Study of Bugs) - Spider Identification please:

Tonya:    That is a "Rabid Wolf Spider," Rabidosa rabida.  Not dangerous in any way, but just simply has an inappropriate name.    http://bugguide.net/node/view/26084    I can tell you this:  When

2016-07-21 Physics - Density:

Density is not the same as viscosity.  Density is the amount of mass per unit volume.  That's it, nothing more.  If I have 1.2 kg in a cubic meter (air), that is its density.  If I have 1000 kg in a cubic

2016-07-21 Geology - Petrified nutshell:

Hi there Des,  Looks like an interesting find. However, your attached picture is only thumbnail quality and I can't make out any details to give you some detailed answer. In a nutshell (no pun intended)

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