document.write( "Question 119809: \r
\n" ); document.write( "\n" ); document.write( "1) how do u write an equation in slope-intercept form of the line that passes through (2,-7) and is parallel to the graph of y=x-2?\r
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\n" ); document.write( "\n" ); document.write( "2) (2,3), y=x+5\r
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\n" ); document.write( "\n" ); document.write( "3) (-5,-4), 2x+3y=-1
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Algebra.Com's Answer #87794 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
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Solved by pluggable solver: Finding the Equation of a Line Parallel or Perpendicular to a Given Line

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\n" ); document.write( " Since any two parallel lines have the same slope we know the slope of the unknown line is \"1\" (its from the slope of \"y=1%2Ax-2\" which is also \"1\").\n" ); document.write( "Also since the unknown line goes through (2,-7), we can find the equation by plugging in this info into the point-slope formula
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\n" ); document.write( " Point-Slope Formula:
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\n" ); document.write( " \"y-y%5B1%5D=m%28x-x%5B1%5D%29\" where m is the slope and (\"x%5B1%5D\",\"y%5B1%5D\") is the given point
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\n" ); document.write( " \"y%2B7=1%2A%28x-2%29\" Plug in \"m=1\", \"x%5B1%5D=2\", and \"y%5B1%5D=-7\"
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\n" ); document.write( " \"y%2B7=1%2Ax-%281%29%282%29\" Distribute \"1\"
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\n" ); document.write( " \"y%2B7=1%2Ax-2\" Multiply
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\n" ); document.write( " \"y=1%2Ax-2-7\"Subtract \"-7\" from both sides to isolate y
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\n" ); document.write( " \"y=1%2Ax-9\" Combine like terms
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\n" ); document.write( " So the equation of the line that is parallel to \"y=1%2Ax-2\" and goes through (\"2\",\"-7\") is \"y=1%2Ax-9\"
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\n" ); document.write( " So here are the graphs of the equations \"y=1%2Ax-2\" and \"y=1%2Ax-9\"
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\n" ); document.write( " graph of the given equation \"y=1%2Ax-2\" (red) and graph of the line \"y=1%2Ax-9\"(green) that is parallel to the given graph and goes through (\"2\",\"-7\")
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Solved by pluggable solver: Finding the Equation of a Line Parallel or Perpendicular to a Given Line

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\n" ); document.write( " Since any two parallel lines have the same slope we know the slope of the unknown line is \"1\" (its from the slope of \"y=1%2Ax%2B5\" which is also \"1\").\n" ); document.write( "Also since the unknown line goes through (2,3), we can find the equation by plugging in this info into the point-slope formula
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\n" ); document.write( " Point-Slope Formula:
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\n" ); document.write( " \"y-y%5B1%5D=m%28x-x%5B1%5D%29\" where m is the slope and (\"x%5B1%5D\",\"y%5B1%5D\") is the given point
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\n" ); document.write( " \"y-3=1%2A%28x-2%29\" Plug in \"m=1\", \"x%5B1%5D=2\", and \"y%5B1%5D=3\"
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\n" ); document.write( " \"y-3=1%2Ax-%281%29%282%29\" Distribute \"1\"
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\n" ); document.write( " \"y-3=1%2Ax-2\" Multiply
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\n" ); document.write( " \"y=1%2Ax-2%2B3\"Add \"3\" to both sides to isolate y
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\n" ); document.write( " \"y=1%2Ax%2B1\" Combine like terms
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\n" ); document.write( " So the equation of the line that is parallel to \"y=1%2Ax%2B5\" and goes through (\"2\",\"3\") is \"y=1%2Ax%2B1\"
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\n" ); document.write( " So here are the graphs of the equations \"y=1%2Ax%2B5\" and \"y=1%2Ax%2B1\"
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\n" ); document.write( " graph of the given equation \"y=1%2Ax%2B5\" (red) and graph of the line \"y=1%2Ax%2B1\"(green) that is parallel to the given graph and goes through (\"2\",\"3\")
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\n" ); document.write( "\n" ); document.write( "First convert the standard equation \"2x%2B3y=-1\" into slope intercept form\r
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Solved by pluggable solver: Converting Linear Equations in Standard form to Slope-Intercept Form (and vice versa)
Convert from standard form (Ax+By = C) to slope-intercept form (y = mx+b)


\"2x%2B3y=-1\" Start with the given equation


\"2x%2B3y-2x=-1-2x\" Subtract 2x from both sides


\"3y=-2x-1\" Simplify


\"%283y%29%2F%283%29=%28-2x-1%29%2F%283%29\" Divide both sides by 3 to isolate y


\"y+=+%28-2x%29%2F%283%29%2B%28-1%29%2F%283%29\" Break up the fraction on the right hand side


\"y+=+%28-2%2F3%29x-1%2F3\" Reduce and simplify


The original equation \"2x%2B3y=-1\" (standard form) is equivalent to \"y+=+%28-2%2F3%29x-1%2F3\" (slope-intercept form)


The equation \"y+=+%28-2%2F3%29x-1%2F3\" is in the form \"y=mx%2Bb\" where \"m=-2%2F3\" is the slope and \"b=-1%2F3\" is the y intercept.



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\n" ); document.write( "\n" ); document.write( "Now let's find the equation of the line that is parallel to \"y=%28-2%2F3%29x-1%2F3\" which goes through (-5,-4)\r
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Solved by pluggable solver: Finding the Equation of a Line Parallel or Perpendicular to a Given Line

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\n" ); document.write( " Since any two parallel lines have the same slope we know the slope of the unknown line is \"-2%2F3\" (its from the slope of \"y=%28-2%2F3%29%2Ax-1%2F3\" which is also \"-2%2F3\").\n" ); document.write( "Also since the unknown line goes through (-5,-4), we can find the equation by plugging in this info into the point-slope formula
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\n" ); document.write( " Point-Slope Formula:
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\n" ); document.write( " \"y-y%5B1%5D=m%28x-x%5B1%5D%29\" where m is the slope and (\"x%5B1%5D\",\"y%5B1%5D\") is the given point
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\n" ); document.write( " \"y%2B4=%28-2%2F3%29%2A%28x%2B5%29\" Plug in \"m=-2%2F3\", \"x%5B1%5D=-5\", and \"y%5B1%5D=-4\"
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\n" ); document.write( " \"y%2B4=%28-2%2F3%29%2Ax%2B%282%2F3%29%28-5%29\" Distribute \"-2%2F3\"
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\n" ); document.write( " \"y%2B4=%28-2%2F3%29%2Ax-10%2F3\" Multiply
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\n" ); document.write( " \"y=%28-2%2F3%29%2Ax-10%2F3-4\"Subtract \"-4\" from both sides to isolate y
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\n" ); document.write( " \"y=%28-2%2F3%29%2Ax-10%2F3-12%2F3\" Make into equivalent fractions with equal denominators
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\n" ); document.write( " \"y=%28-2%2F3%29%2Ax-22%2F3\" Combine the fractions
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\n" ); document.write( " \"y=%28-2%2F3%29%2Ax-22%2F3\" Reduce any fractions
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\n" ); document.write( " So the equation of the line that is parallel to \"y=%28-2%2F3%29%2Ax-1%2F3\" and goes through (\"-5\",\"-4\") is \"y=%28-2%2F3%29%2Ax-22%2F3\"
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\n" ); document.write( " So here are the graphs of the equations \"y=%28-2%2F3%29%2Ax-1%2F3\" and \"y=%28-2%2F3%29%2Ax-22%2F3\"
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\n" ); document.write( " graph of the given equation \"y=%28-2%2F3%29%2Ax-1%2F3\" (red) and graph of the line \"y=%28-2%2F3%29%2Ax-22%2F3\"(green) that is parallel to the given graph and goes through (\"-5\",\"-4\")
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