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OpenStudy (ttop0816):
Given the system of equations, what is the value of the system determinant? 2x + y = 8 x - y = 10 -1 -2 -3
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OpenStudy (the_fizicx99):
The y's cancel out.. So its 2x + x = 8 + 10 3x = 18 /3 /3 x = 6
OpenStudy (ttop0816):
but then its not in the choices):
OpenStudy (the_fizicx99):
Oh, matrix? 2 + 1 1 - 1 = 2*(-1) - 1*1 = -2 - 1 = -3
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