document.write( "Question 436465: legs of a right triangle have lengths x + 4 and x+ 7. The hypoetnuse has length 3x. Find the perimeter of the triangle. answer choices: a. 36 units, B. 33 units and C. 31 units \n" ); document.write( "
Algebra.Com's Answer #301969 by robertb(5830)\"\" \"About 
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\"%28x%2B4%29%5E2+%2B+%28x%2B7%29%5E2+=+9x%5E2\"
\n" ); document.write( "<==> \"x%5E2+%2B+8x+%2B+16+%2B+x%5E2+%2B+14x+%2B+49+=+9x%5E2\"
\n" ); document.write( "<==> \"0+=+7x%5E2+-+22x+-+65+=+0\"
\n" ); document.write( "(x-5)(7x +13) = 0
\n" ); document.write( "==> x = 5, -13/7.
\n" ); document.write( "Choose only 5.\r
\n" ); document.write( "\n" ); document.write( "The sides of the triangle are 9, 12, and 15.
\n" ); document.write( "The perimeter is 36 units.
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