11th grade math - graphing linear equations. help!!!
determine whether each equation is a linear equation. if so, write the equation in standard form.
y=2-3x
5x=y-4
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OpenStudy (anonymous):
standard form looks like
\[ax+by=c\]
OpenStudy (anonymous):
for the first one, add \(3x\) to both sides and you get it in one step
OpenStudy (radvedder):
yes, but i'm not sure how to get it like that. can you help me on a few of them?
OpenStudy (anonymous):
\[y=2-3x\\
3x+y=2\] finito
OpenStudy (radvedder):
i'm not sure if i subtract 2 or add 3x?
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OpenStudy (radvedder):
how'd you get it like that
OpenStudy (anonymous):
you want all the variables on the left, so you would add \(3x\) to both sides
OpenStudy (anonymous):
by "add" i just mean write it
OpenStudy (radvedder):
ohh i see!
OpenStudy (diamondboy):
y= mx + b is d standard form for linear equations
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OpenStudy (radvedder):
is it still not in standard form? 3x+y=2
OpenStudy (anonymous):
|dw:1425241348185:dw|
OpenStudy (radvedder):
yes, i have 3x+y=2 now. do i leave it at that?
OpenStudy (anonymous):
yes \[3x+y=2\] is STANDARD FORM
OpenStudy (anonymous):
leave it be, don't mess with it
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OpenStudy (diamondboy):
for linear equations?
OpenStudy (anonymous):
@diamondboy yes,
\[ax+by=c\] standard form
\[y=mx+b\] slope intercept form
OpenStudy (diamondboy):
yep u are right I am so sorry
OpenStudy (radvedder):
and the next one is 5x=y-4
OpenStudy (radvedder):
i would add 4?
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OpenStudy (anonymous):
no
OpenStudy (diamondboy):
subtract y from both sides
OpenStudy (anonymous):
you want the variables on the left
subtract \(y\)
OpenStudy (radvedder):
5x-y=4
OpenStudy (anonymous):
no
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OpenStudy (radvedder):
which is standard, yes?
OpenStudy (anonymous):
the \(-4\) is what stays on the right
OpenStudy (anonymous):
\[5x=y-4\\
5x-y=-4\] the minus sign does not go away