document.write( "Question 1054737: Please help
\n" ); document.write( "1. A right angled triangle sides in the ratio 3:5:7. If the hypotenuse is 84mm, find the length of the other two sides.
\n" ); document.write( "2. A mass is composed of 3 parts of copper and 4 parts of Zinc. Find the mass of copper and Zinc in a casting with a mass of 98kg.
\n" ); document.write( "

Algebra.Com's Answer #669975 by ankor@dixie-net.com(22740)\"\" \"About 
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1. A right angled triangle sides in the ratio 3:5:7. If the hypotenuse is 84mm, find the length of the other two sides.
\n" ); document.write( "This can't be a right triangle, but we can ignore the 7 and find the two sides that has a hypotenuse of 84
\n" ); document.write( "let x = the multiplier
\n" ); document.write( "then
\n" ); document.write( "3x = one side
\n" ); document.write( "5x = the other side
\n" ); document.write( "84 = the hypotenuse
\n" ); document.write( "pythag
\n" ); document.write( "(3x)^2 + (5x)^2 = 84^2
\n" ); document.write( "9x^2 + 25x^2 = 7056
\n" ); document.write( "34x^2 = 7056
\n" ); document.write( "x^2 = 7056/34
\n" ); document.write( "x^2 = 207.53
\n" ); document.write( "x = \"sqrt%28207.53%29\"
\n" ); document.write( "x = 14.406 is the multiplier
\n" ); document.write( "therefore
\n" ); document.write( "3 * 14.406 = 43.218 cm is one side
\n" ); document.write( "and
\n" ); document.write( "5 * 14.406 = 72.030 cm is the other side
\n" ); document.write( ":
\n" ); document.write( "Check with your calc: find the hypotenuse: \"sqrt%2843.218%5E2+%2B+72.03%5E2%29\" = 84.00
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "2. A mass is composed of 3 parts of copper and 4 parts of Zinc.
\n" ); document.write( " Find the mass of copper and Zinc in a casting with a mass of 98kg.
\n" ); document.write( "Let x = the multiplier
\n" ); document.write( "then
\n" ); document.write( "3x = amt of copper
\n" ); document.write( "4x = amt of zinc
\n" ); document.write( "the equation
\n" ); document.write( "3x + 4x = 98
\n" ); document.write( "7x = 98
\n" ); document.write( "x = 98/7
\n" ); document.write( "x = 14 is the multiplier
\n" ); document.write( "therefore
\n" ); document.write( "3 * 14 = 42 kg is the amt of copper
\n" ); document.write( "4 * 14 = 56 kg is the amt of zinc
\n" ); document.write( ":
\n" ); document.write( "Check 42 + 56 = 98
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