document.write( "Question 883804: Find the coordinates of a point P if P is one unit from Q(-5,-12) along the line from the origin to Q \n" ); document.write( "
Algebra.Com's Answer #533782 by Edwin McCravy(20059)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Draw vertical lines from the known, Q, and unknown, P, points to the x-axis:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "There are two similar right triangles.  The line from the origin to Q(-5,-12)\r\n" );
document.write( "is the hypotenuse of the large right triangle.  We find it by the Pythagorean\r\n" );
document.write( "theorem\r\n" );
document.write( "\r\n" );
document.write( "\"c%5E2=a%5E2%2Bb%5E2\"\r\n" );
document.write( "\"c%5E2=%28-5%29%5E2%2B%28-12%29%5E2\"\r\n" );
document.write( "\"c%5E2=25%2B144\"\r\n" );
document.write( "\"c%5E2=169\"\r\n" );
document.write( "\"c=sqrt%28169%29\"\r\n" );
document.write( "\"c=13\"\r\n" );
document.write( "\r\n" );
document.write( "We want the hypotenuse of the smaller right triangle to be 1.\r\n" );
document.write( "The line from the origin to P(x,y) is the hypotenuse of the small right\r\n" );
document.write( "triangle, and we set it to equal 1.\r\n" );
document.write( "\r\n" );
document.write( "\"matrix%281%2C2%2Csmall%2Chypotenuse%29%2Fmatrix%281%2C2%2Clarge%2Chypotenuse%29\"\"%22%22=%22%22\"\r\n" );
document.write( "\r\n" );
document.write( "or\r\n" );
document.write( "\r\n" );
document.write( "\"1%2F13\"\"%22%22=%22%22\"\"x%2F%28-5%29\"\r\n" );
document.write( "\r\n" );
document.write( "\"13x\"\"%22%22=%22%22\"\"-5\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"-5%2F13\"\r\n" );
document.write( "\r\n" );
document.write( "\"matrix%281%2C2%2Csmall%2Chypotenuse%29%2Fmatrix%281%2C2%2Clarge%2Chypotenuse%29\"\"%22%22=%22%22\"\r\n" );
document.write( "\r\n" );
document.write( "or\r\n" );
document.write( "\r\n" );
document.write( "\"1%2F13\"\"%22%22=%22%22\"\"x%2F%28-5%29\"\r\n" );
document.write( "\r\n" );
document.write( "\"13x\"\"%22%22=%22%22\"\"-5\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"-5%2F13\" \r\n" );
document.write( "\r\n" );
document.write( "---\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\"matrix%281%2C2%2Csmall%2Chypotenuse%29%2Fmatrix%281%2C2%2Clarge%2Chypotenuse%29\"\"%22%22=%22%22\"\"matrix%281%2C3%2Csmall%2Cvertical%2Cside%29%2Fmatrix%281%2C3%2Clarge%2Cvertical%2Cside%29\"\r\n" );
document.write( "\r\n" );
document.write( "or\r\n" );
document.write( "\r\n" );
document.write( "\"1%2F13\"\"%22%22=%22%22\"\"y%2F%28-12%29\"\r\n" );
document.write( "\r\n" );
document.write( "\"13y\"\"%22%22=%22%22\"\"-12\"\r\n" );
document.write( "\r\n" );
document.write( "\"y\"\"%22%22=%22%22\"\"-12%2F13\"\r\n" );
document.write( "\r\n" );
document.write( "So the coordinates of the point that is 1 unit along the line is\r\n" );
document.write( "\r\n" );
document.write( "P(x,y) = \"P%28matrix%281%2C3%2C-5%2F13%2C%22%2C%22%2C-12%2F13%29%29\"\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( "
\n" ); document.write( "
\n" );