document.write( "Question 1070834: A radiator contains 6 quarts of fluid, 15% of which is antifreeze. How much fluid should be drained and replaced with pure antifreeze so that the new mixture is 45% antifreeze? (Round your answer to two decimal places.) \n" ); document.write( "

Algebra.Com's Answer #685832 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = quarts of fluid to be drained
\n" ); document.write( "and replaced
\n" ); document.write( " $\"+.15x+\"$ = quarts of antifreeze in the fliuid
\n" ); document.write( "that is drained and replaced
\n" ); document.write( "-----------------------------------------
\n" ); document.write( " $\"+%28+.15%2A%28+6+-+x+%29+%2B+x+%29+%2F+6+=+.45+\"$
\n" ); document.write( " $\"+%28+.9+-+.15x+%2B+x+%29+%2F+6+=+.45+\"$
\n" ); document.write( " $\"+%28+.85x+%2B+.9+%29+%2F+6+=+.45+\"$
\n" ); document.write( " $\"+.85x+%2B+.9+=+2.7+\"$
\n" ); document.write( " $\"+.85x+=+1.8+\"$
\n" ); document.write( " $\"+x+=+2.1176+\"$
\n" ); document.write( "2.12 quarts of fluid must be drained and replaced
\n" ); document.write( "-------------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+.15%2A6+=+.9+\"$ ounces of antifreeze to start with
\n" ); document.write( " $\"+.15%2A2.12+=+.318+\"$ ounces of antifreeze is drained off
\n" ); document.write( " $\"+2.12+\"$ ounces of antifreeze is added
\n" ); document.write( "---------------------------------------
\n" ); document.write( " $\"+.9+-+.318+%2B+2.12+=+2.702+\"$ final ounces of antifreeze
\n" ); document.write( " $\"+2.702%2F6+=+.45+\"$
\n" ); document.write( " $\"+2.702+=+2.7+\"$
\n" ); document.write( "close enough
\n" ); document.write( "check the math
\n" ); document.write( "Get another opinion if needed\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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