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OpenStudy (anonymous):
How many solutions exist for the system y = 2x + 5 and y = -0.2x - 4? no solution one solution infinitely many solutions
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hero (hero):
y = y 2x + 5 = -0.2x - 4 2x + .2x = -4 - 5 2.2x = -9 One solution
OpenStudy (anonymous):
y = 2x + 5 [1] y = -0.2x - 4 [2] [1]-[2] 0=2.02x+9 -9=2.02x x=-4.46 So y= 2*-4.46+5 =-3.92 So there is only one solution.
OpenStudy (anonymous):
:)
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