Mathematics
11 Online
OpenStudy (anonymous):
12) The lines of two equations are graphed below. Name the ordered pair that is the solution of the two equations.
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OpenStudy (anonymous):
OpenStudy (anonymous):
i think the answer is (5,-4)
OpenStudy (anonymous):
@freckles
OpenStudy (anonymous):
@freckles
OpenStudy (freckles):
you are ...
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OpenStudy (freckles):
absolutely correct! :)
OpenStudy (anonymous):
yay! now im confused on this next one im only going to put the graph up cuz its the same question just dif graph but i dont think it has one..
OpenStudy (anonymous):
OpenStudy (anonymous):
@freckles
OpenStudy (freckles):
hint: those are parallel lines
you said earlier parallel lines do not intersect
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OpenStudy (anonymous):
so i should just put The system of equations has one solution
OpenStudy (freckles):
no they never cross
OpenStudy (freckles):
it is impossible for them to have any solution
OpenStudy (anonymous):
i ment The system of equations has no solution.
OpenStudy (freckles):
right you would say no solution
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OpenStudy (anonymous):
okay so how would i find the ordered pair with equations? example
OpenStudy (anonymous):
@freckles
OpenStudy (freckles):
you could solve
1/2*x+1=-2x+6 for x
OpenStudy (freckles):
let me know what you get after doing that
OpenStudy (freckles):
and then we will find y
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OpenStudy (anonymous):
okay x =2 so now i substitute x for 2?
OpenStudy (freckles):
yep
OpenStudy (anonymous):
so the answer would still be 2 so to put it in ordered pair would i put (2,2)
OpenStudy (freckles):
:) that is exactly what I got
OpenStudy (anonymous):
:) yay!! now this one is different
x+y=-5
x+y=6
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OpenStudy (freckles):
well you could subtract one equation from the other eliminating
(x+y)-(x+y)=-5-6
is this a true equation that results?