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OpenStudy (anonymous):
Solve the system of equations. 5x+9y+9z=5 4x+9y+6z=10 2x+2y+5z=9 Answer choices: A. x=116, y=8,z=-21 B.x=82, y=-10, z=9 C. x=-116, y=28,z=37 D. x=6,y=-14,z=1
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OpenStudy (ksaimouli):
Are you allowed to use a calculator? If or if not, you can use rref
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
According to Mathematica v9, it's C. 0.001890 seconds on a mid 2010 IMac running 8 gb of ram.
OpenStudy (anonymous):
answer is c by caculator
OpenStudy (anonymous):
thank you!
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