document.write( "Question 22577: If y varies directly as x and y=8 when x=3 find y when x=5 \n" ); document.write( "
Algebra.Com's Answer #10992 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! y varies directly as x means the following: \n" ); document.write( "y= kx where \"k\" is a number we have to find. \n" ); document.write( "Since y=8 when x=3 we get the following equation \n" ); document.write( "which allows us to solve for \"k\": 8=k(3) \n" ); document.write( "Therefore k=8/3 \n" ); document.write( "Now we know the general formula is y=(8/3)x \n" ); document.write( "So, if x=5 y=(8/3)(5) = 40/3\r \n" ); document.write( "\n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |