document.write( "Question 243876: The unit of measure for a line is in inches. Use the distance formula to find the length of the line with points at (- 3, 0) and (4, 3). \n" ); document.write( "
Algebra.Com's Answer #179521 by richwmiller(17219)\"\" \"About 
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c^2=a^2+b^2
\n" ); document.write( "is the formula for finding the hypotenuse of a right triangle.\r
\n" ); document.write( "\n" ); document.write( "Think of the points as the ends of the hypotenuse of a right triangle.
\n" ); document.write( "one leg (x) of the triangle goes from 4 to -3
\n" ); document.write( "so we subtract -3 from 4
\n" ); document.write( "and the other leg (y) goes from 3 to 0
\n" ); document.write( "so we subtract 0 from 3
\n" ); document.write( "so first we need to find the length of each leg of the triangle
\n" ); document.write( "where a=4-(-3)=7
\n" ); document.write( "and b=3-0=3
\n" ); document.write( "substitute
\n" ); document.write( "c^2=7^2+3^2
\n" ); document.write( "calculate squares
\n" ); document.write( "c^2=49+9
\n" ); document.write( "add
\n" ); document.write( "c^2=58
\n" ); document.write( "find square root
\n" ); document.write( "c=sqrt(58)= abt 7.6 inches
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