document.write( "Question 491444: The Octane rating of a gasoline is a measure of the amount of iso-octane in the gas. Manufacture recommend using 93-octane gasoline on returned motors. How much 87-octane gas and 95-octane gas should Yousef mix in order to make 10 gallons of octane for his returned F-150? \n" ); document.write( "

Algebra.Com's Answer #334635 by stanbon(75887) $\"\"$ $\"About$

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Manufacturers recommend using 93-octane gasoline on returned motors. How much 87-octane gas and 95-octane gas should Yousef mix in order to make 10 gallons of octane for his returned F-150?
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\n" ); document.write( "Equation:
\n" ); document.write( "iso + iso = iso
\n" ); document.write( "0.87x + 0.95(10-x) = 0.93*10
\n" ); document.write( "---------------------------------
\n" ); document.write( "Multiply thru by 100 to get:
\n" ); document.write( "87x + 95*10 - 95x = 93*10
\n" ); document.write( "----
\n" ); document.write( "-8x = -2*10
\n" ); document.write( "x = 2.5 gallons (amt. of 87-octane needed)
\n" ); document.write( "---
\n" ); document.write( "10-x = 7.5 gallons (amt. of 95-octane needed)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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