document.write( "Question 197691: Greg bought a gold coin for $9,000. If the value of the ring increases at a constant rate of 1.79% per year, how many years will it be for the ring to be worth $17,978.02? \n" ); document.write( "
Algebra.Com's Answer #149074 by jojo14344(1513)\"\" \"About 
You can put this solution on YOUR website!

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\n" ); document.write( "\n" ); document.write( "The increasing rate of Gold Coin follows:
\n" ); document.write( "\"P%2BP%2ARate%28n%29=F\", where\"system%28P=9000%2CRate=0.0179%2Fyr%2Cred%28n=years%29%2CF=17978.02%29\"\r
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\n" ); document.write( "\n" ); document.write( "Substituting:
\n" ); document.write( "\"9000%2B%289000%29%280.0179%29%28red%28n%29%29=17978.02\"
\n" ); document.write( "\"161.10%2A%28red%28n%29%29=17978.02-9000\"
\n" ); document.write( "\"cross%28161.10%29%2Ared%28n%29=%2817978.02-9000%29%2F161.10=8978.02%2F161.10\"
\n" ); document.write( "\"highlight%28red%28n=55.73yrs%29%29\", let us say 56 years\r
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\n" ); document.write( "\n" ); document.write( "*One good way to check on this is by graphing.\r
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\n" ); document.write( "\n" ); document.write( "Let us appoint the following:
\n" ); document.write( "\"x=red%28years%29\" & \"y=red%28Price%29\"
\n" ); document.write( "It follows,\"system%28x%5B1%5D=0%2Cy%5B1%5D=9000%2Cx%5B2%5D=55.73%2Cy%5B2%5D=17978.02%29\"
\n" ); document.write( "Via Point Slope Form,
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\n" ); document.write( "\"red%28m=161.10%29\"\r
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\n" ); document.write( "\n" ); document.write( " Thru point \"x%5B1%5D\" & \"y%5B1%5D\", (0,9000)
\n" ); document.write( "\"y=mx%2Bb\", Slope-Intercept Form
\n" ); document.write( "\"9000=%28161.10%29%280%29%2Bb\"
\n" ); document.write( "\"9000=0%2Bb\"
\n" ); document.write( "\"b=9000\", Y-Intercept\r
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\n" ); document.write( "\n" ); document.write( "It follows ---> \"red%28y=%28161.10%29x%2B9000%29\", Line Eqn\r
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\n" ); document.write( "\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo
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