document.write( "Question 450557: Hi,
\n" );
document.write( "Find the distance from point (2, -3) to the line \r
\n" );
document.write( "\n" );
document.write( "Thanks :D \n" );
document.write( "
Algebra.Com's Answer #309984 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Find the distance from point (2, -3) to the line \n" ); document.write( "------------------ \n" ); document.write( "The distance from a point to a line can be an infinite # of values. \n" ); document.write( "To find the shortest distance: \n" ); document.write( "The slope of 3x-y = 4 is 3. \n" ); document.write( "Lines perpendicular will have a slope that's the negative inverse, m = -1/3. \n" ); document.write( "------------- \n" ); document.write( "Find the eqn of the line with a slope of -1/3 that passes thru (2,-3) \n" ); document.write( "Use y = mx + b \n" ); document.write( "-3 = (-1/3)*2 + b \n" ); document.write( "b = -7/3 \n" ); document.write( "--> y = -x/3 - 7/3 is the eqn of the line thru (2,-3) perpendicular to the other line. \n" ); document.write( "---------- \n" ); document.write( "Find the intersection of the 2 lines \n" ); document.write( "3x - y = 4 \n" ); document.write( "Sub for y \n" ); document.write( "3x - (-x/3 - 7/3) = 4 \n" ); document.write( "10x/3 + 7/3 = 4 \n" ); document.write( "10x + 7 = 12 \n" ); document.write( "x = 1/2 \n" ); document.write( "-------- \n" ); document.write( "y = -5/2 \n" ); document.write( "--------- \n" ); document.write( "Find the distance from (2,-3) to (1/2,-5/2) \n" ); document.write( " \n" ); document.write( "d = sqrt(10)/2 \n" ); document.write( "d =~ 1.5811 \n" ); document.write( " \n" ); document.write( " |