document.write( "Question 93842: write the equation of the line L. satisfying each of the following sets of geometric conditions. L passes through (5,6) and is perpendicular to 3x-5y=15\r
\n" ); document.write( "\n" ); document.write( "L has y-intercept(0,-3) and is paralell to -3x+5y=-15
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Algebra.Com's Answer #68363 by jim_thompson5910(35256)\"\" \"About 
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\"L passes through (5,6) and is perpendicular to 3x-5y=15\"\r
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\n" ); document.write( "\n" ); document.write( "First convert 3x-5y=15 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)


\"3x-5y=15\" Start with the given equation


\"3x-5y-3x=15-3x\" Subtract 3x from both sides


\"-5y=-3x%2B15\" Simplify


\"%28-5y%29%2F%28-5%29=%28-3x%2B15%29%2F%28-5%29\" Divide both sides by -5 to isolate y


\"y+=+%28-3x%29%2F%28-5%29%2B%2815%29%2F%28-5%29\" Break up the fraction on the right hand side


\"y+=+%283%2F5%29x-3\" Reduce and simplify


The original equation \"3x-5y=15\" (standard form) is equivalent to \"y+=+%283%2F5%29x-3\" (slope-intercept form)


The equation \"y+=+%283%2F5%29x-3\" is in the form \"y=mx%2Bb\" where \"m=3%2F5\" is the slope and \"b=-3\" is the y intercept.



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\n" ); document.write( "\n" ); document.write( "Now lets find the perpendicular line \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( " Remember, any two perpendicular lines are negative reciprocals of each other. So if you're given the slope of \"3%2F5\", you can find the perpendicular slope by this formula:
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\n" ); document.write( " \"m%5Bp%5D=-1%2Fm\" where \"m%5Bp%5D\" is the perpendicular slope
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\n" ); document.write( " \"m%5Bp%5D=-1%2F%283%2F5%29\" So plug in the given slope to find the perpendicular slope
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\n" ); document.write( " \"m%5Bp%5D=%28-1%2F1%29%285%2F3%29\" When you divide fractions, you multiply the first fraction (which is really \"1%2F1\") by the reciprocal of the second
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\n" ); document.write( " \"m%5Bp%5D=-5%2F3\" Multiply the fractions.
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\n" ); document.write( " So the perpendicular slope is \"-5%2F3\"
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\n" ); document.write( " So now we know the slope of the unknown line is \"-5%2F3\" (its the negative reciprocal of \"3%2F5\" from the line \"y=%283%2F5%29%2Ax-3\").\n" ); document.write( "Also since the unknown line goes through (5,6), 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-6=%28-5%2F3%29%2A%28x-5%29\" Plug in \"m=-5%2F3\", \"x%5B1%5D=5\", and \"y%5B1%5D=6\"
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\n" ); document.write( " \"y-6=%28-5%2F3%29%2Ax%2B%285%2F3%29%285%29\" Distribute \"-5%2F3\"
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\n" ); document.write( " \"y-6=%28-5%2F3%29%2Ax%2B25%2F3\" Multiply
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\n" ); document.write( " \"y=%28-5%2F3%29%2Ax%2B25%2F3%2B6\"Add \"6\" to both sides to isolate y
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\n" ); document.write( " \"y=%28-5%2F3%29%2Ax%2B25%2F3%2B18%2F3\" Make into equivalent fractions with equal denominators
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\n" ); document.write( " \"y=%28-5%2F3%29%2Ax%2B43%2F3\" Combine the fractions
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\n" ); document.write( " \"y=%28-5%2F3%29%2Ax%2B43%2F3\" Reduce any fractions
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\n" ); document.write( " So the equation of the line that is perpendicular to \"y=%283%2F5%29%2Ax-3\" and goes through (\"5\",\"6\") is \"y=%28-5%2F3%29%2Ax%2B43%2F3\"
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\n" ); document.write( " So here are the graphs of the equations \"y=%283%2F5%29%2Ax-3\" and \"y=%28-5%2F3%29%2Ax%2B43%2F3\"
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\n" ); document.write( " graph of the given equation \"y=%283%2F5%29%2Ax-3\" (red) and graph of the line \"y=%28-5%2F3%29%2Ax%2B43%2F3\"(green) that is perpendicular to the given graph and goes through (\"5\",\"6\")
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\n" ); document.write( "\n" ); document.write( "\"L has y-intercept(0,-3) and is paralell to -3x+5y=-15\"\r
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\n" ); document.write( "\n" ); document.write( "First convert -3x+5y=-15 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)


\"-3x%2B5y=-15\" Start with the given equation


\"-3x%2B5y%2B3x=-15%2B3x\" Add 3x to both sides


\"5y=3x-15\" Simplify


\"%285y%29%2F%285%29=%283x-15%29%2F%285%29\" Divide both sides by 5 to isolate y


\"y+=+%283x%29%2F%285%29%2B%28-15%29%2F%285%29\" Break up the fraction on the right hand side


\"y+=+%283%2F5%29x-3\" Reduce and simplify


The original equation \"-3x%2B5y=-15\" (standard form) is equivalent to \"y+=+%283%2F5%29x-3\" (slope-intercept form)


The equation \"y+=+%283%2F5%29x-3\" is in the form \"y=mx%2Bb\" where \"m=3%2F5\" is the slope and \"b=-3\" is the y intercept.



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\n" ); document.write( "\n" ); document.write( "Now lets find the parallel line \r
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Solved by pluggable solver: Finding the Equation of a Line Parallel or Perpendicular to a Given Line
The equation \"y=%283%2F5%29%2Ax-3\" goes through the point (\"0\",\"-3\") (which is equal and parallel to the given equation)

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\n" ); document.write( "\n" ); document.write( "So the equation parallel to \"-3x%2B5y=-15\" and that goes through (0,-3) is \"%283%2F5%29x-3\" (or \"-3x%2B5y=-15\")
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