Mathematics
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OpenStudy (anonymous):
Help
Solve the equation for k. Hint. First Multiply both sides by 2
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OpenStudy (anonymous):
\[\frac{ 2mk +2j}{ 2 } = n+p \]
OpenStudy (anonymous):
If you multiplied both sides you would get \[ mk+mj = n+ p\] right?
jimthompson5910 (jim_thompson5910):
actually, it would be
\[\Large 2mk+2j = 2(n+p)\]
OpenStudy (anonymous):
ok
2mk+ 2j= 2n+2p
jimthompson5910 (jim_thompson5910):
yes
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OpenStudy (anonymous):
then what
jimthompson5910 (jim_thompson5910):
move the 2j over
OpenStudy (anonymous):
subtract it
OpenStudy (anonymous):
?
jimthompson5910 (jim_thompson5910):
yes subtract 2j from both sides
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OpenStudy (anonymous):
then divide both sides by 2?
jimthompson5910 (jim_thompson5910):
divide both sides by 2m
jimthompson5910 (jim_thompson5910):
to isolate k
OpenStudy (anonymous):
\[k =\frac{ n }{ m } +\frac{ p }{ m } + \frac{ j }{ m }\]
jimthompson5910 (jim_thompson5910):
it should be
\[\Large k = \frac{n}{m}+\frac{p}{m}-\frac{j}{m}\]
you can also write that as
\[\Large k = \frac{n+p-j}{m}\]
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jimthompson5910 (jim_thompson5910):
notice it's minus j over m and NOT plus j over m
OpenStudy (anonymous):
ok i see
OpenStudy (anonymous):
thats thr final answer?
OpenStudy (anonymous):
@jim_thompson5910
jimthompson5910 (jim_thompson5910):
yes either form works but I prefer the second form
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OpenStudy (anonymous):
thanks can you help me with one other thing
jimthompson5910 (jim_thompson5910):
sure
OpenStudy (anonymous):
How would you write the slope-intercept inequality for a graph
jimthompson5910 (jim_thompson5910):
so you're given a graph and they want the inequality?
OpenStudy (anonymous):
yes but if you have the two points (0,5) and (3,-1) and the line is dashed and shaded like this |dw:1416283119734:dw|