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OpenStudy (anonymous):
how many solutions does the system have? y=3x+9 y=-1/2x-1
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OpenStudy (cwrw238):
subtract the second equation from the first what do you get?
OpenStudy (cwrw238):
you get an equation in x; 0 = 3.5x + 10 which you can solve for x and they you can find y by substitution so it has one solution the graphs of the equations intersect at one point
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