document.write( "Question 352535: Suppose that you deposit P3000 at 7.5% (simple interest) and P5000 at 3.2% (simple interest). What will be the combined interest rate of the two investments? \n" ); document.write( "

Algebra.Com's Answer #251979 by Fombitz(32388) $\"\"$ $\"About$

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$\"I=Prt\"$
\n" ); document.write( "Let $\"t=1+\"$ year.
\n" ); document.write( " $\"I%5B1%5D=3000%280.075%29=225\"$
\n" ); document.write( " $\"I%5B2%5D=5000%280.0032%29=160\"$
\n" ); document.write( " $\"I%5B1%5D%2BI%5B2%5D=225%2B160=385\"$
\n" ); document.write( " $\"r=I%2FP=385%2F%283000%2B5000%29=0.048125\"$
\n" ); document.write( "The combined interest rate is 4.8125%. \n" ); document.write( "

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