document.write( "Question 1145220: A chemical company makes two brands of antifreeze. The first brand is 65% pure antifreeze, and the second brand is 90% pure antifreeze. In order to obtain 110 gallons of a mixture that contains 70% pure antifreeze, how many gallons of each brand of antifreeze must be used? \n" ); document.write( "

Algebra.Com's Answer #766425 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "x = gallons of the 90% mixture.\r\n" );
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document.write( "The equation\r\n" );
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document.write( "    0.65*(110-x) + 0.90x = 0.7*110\r\n" );
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document.write( "The solution is  x =  = 22 gallons.\r\n" );
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document.write( "ANSWER.  22 gallons of the 90% mixture and 110-22 = 88 gallons of the 65% mixture.\r\n" );
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document.write( "CHECK.  0.65*88 + 0.9*22 = 77 gallons of the pure antifreeze in ingredients, and\r\n" );
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document.write( "        0.7*110 = 77 gallons of the pure antifreeze in the final mixture.   ! Correct !\r\n" );
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\n" ); document.write( "\n" ); document.write( "It is a standard and typical mixture problem.\r
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\n" ); document.write( "\n" ); document.write( "For introductory lessons covering various types of mixture word problems see\r
\n" ); document.write( "\n" ); document.write( "    - Mixture problems\r
\n" ); document.write( "\n" ); document.write( "    - More Mixture problems\r
\n" ); document.write( "\n" ); document.write( "    - Solving typical word problems on mixtures for solutions \r
\n" ); document.write( "\n" ); document.write( "    - Typical word problems on mixtures from the archive\r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "You will find there ALL TYPICAL mixture problems with different methods of solutions,
\n" ); document.write( "explained at different levels of detalization, from very detailed to very short.\r
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\n" ); document.write( "\n" ); document.write( "Read them and become an expert in solution mixture word problems.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this textbook in the section \"Word problems\" under the topic \"Mixture problems\".\r
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\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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