document.write( "Question 174012: I have a question on writing equations of parallel lines
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document.write( "I understand that in order for an equation to be parallel with another, they must have the same slope.
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document.write( "here is the problem\r
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document.write( "Write an equation of a line that passes through the point given and is parallel to the given line: (4,7), y= 5x-3
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document.write( "I do not know what to do. please explain the steps for further use. \n" );
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Algebra.Com's Answer #128934 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! The equation (of the line you want to be parallel with) was given as: \n" ); document.write( "y= 5x-3 \n" ); document.write( "This is in the \"slope-intercept\" form: \n" ); document.write( "y = mx + b \n" ); document.write( "where \n" ); document.write( "m is slope \n" ); document.write( "b is the y-intercept \n" ); document.write( ". \n" ); document.write( "From the above, we now know the slope of: \n" ); document.write( "y= 5x-3 \n" ); document.write( "is \n" ); document.write( "m = 5 \n" ); document.write( ". \n" ); document.write( "For two lines to be parallel, both of their slopes must be the same. Therefore, our \"new\" line mus have the slope of 5. \n" ); document.write( ". \n" ); document.write( "Given that we know the slope (5) and a single point (4,7) we stuff that into the \"point slope\" equation: \n" ); document.write( "y - y1 = m(x - x1) \n" ); document.write( "y - 7 = 5(x - 4) \n" ); document.write( "Now, we manipulate to back into the \"slope intercept\" form: \n" ); document.write( "y - 7 = 5x - 20 \n" ); document.write( "y = 5x - 13 (this is what they're looking for) \n" ); document.write( " |