3x-9y =81 2x-6y=-10 solve then classify the system

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3x-9y =81 2x-6y=-10 solve then classify the system

Mathematics
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did you try elimination method or addition method
ive been working with the elimination method i wonder if the substitution method might work too but i havent gotten the right answer either way
either way will work for this problem i think elimination is easier lets cancel out the x's LCM of 2 and 3 is 6 multiply 1st row by -2 multiply 2nd row by 3 -6x +18y = -162 6x -18y = -30 ______________________ 0 + 0 = -192 0 = -192 this is False No solution

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system is inconsistent
if this occurs, then it's Undefined...
that means it would be dependent as well right?
x=dependent y=independent and since u don't know either one. "Undefined" then it can't be dependent or independent. unless i'm not seeing something here.
what do you mean undefined?? no not dependent, thats only if there are infinite solutions no solution means these 2 lines are parallel, same slope
Oh. True sorry i wasn't looking at it like this. Just haven't done this for a long time...
ok so it would be independent and inconsistent since both are parallel
correct
ok now the last part of the question to this one is to show it in graph form what would this problem look like graphed
where do you think you were messing up?
graph both lines either by putting them in y=mx+b form or make a table of x,y values and connect the points
whats bad is im trying to learn algebra in a 9 week period and ive never done it in my life back in high school we had the whole yr to learn this
oh online class ? yeah that can be hard
it is very frustrating
so y=(81-3x)/-9 and y=(-10-2x)/-6
I've taken online math before. But it's always gave me an option to view and example of the problem how to solve. It's harder for u...
im posting problems i have trouble with and am hoping to see them worked out with the answer so i can see how they are done but many just give me the answer which is not helping
the graphing problems are hardest becaise noone really can show me what they look like
have you herd of Graphing Calculators? Texas Instruments...
@beehive yeah those examples can be really helpful but they dont answer everyones questions and you dont know why you do the steps it shows you to do
graphcalc.com free graphing software
ill chk it out im gonna post a few more and head to bed my head istarting to hurt lol

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