document.write( "Question 912626: Huda opened a bank account with $30.00 and deposited $25.00 every month. After several months, she had a total of $180 in her account. For how many months did Huda save?\r
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\n" ); document.write( "\n" ); document.write( "I know it's summation notation but the answer I am coming up with is not right and seems off. I thought it should be sigma and above it x and below it n=1 and then next to it 30(25)^n-1 so then the equation would be 30(1-25^x/1-25)=180 but I keep getting 1.546 and I know that is not right because it is not one of the options. Please help? thanks!
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Algebra.Com's Answer #553945 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
Let x = number of months Huda saved\r
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\n" ); document.write( "\n" ); document.write( "She starts with $30 and adds $25 each month. I'm assuming she deposits $25 each time. So for x months, she'll add on 25x dollars.\r
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\n" ); document.write( "\n" ); document.write( "Total Saved Over x Months: 30 + 25x\r
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\n" ); document.write( "\n" ); document.write( "This is set equal to 180 because \"After several months, she had a total of $180 in her account\"\r
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\n" ); document.write( "\n" ); document.write( "30 + 25x = 180\r
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\n" ); document.write( "\n" ); document.write( "25x = 180 - 30\r
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\n" ); document.write( "\n" ); document.write( "25x = 150\r
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\n" ); document.write( "\n" ); document.write( "x = 150/25\r
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\n" ); document.write( "\n" ); document.write( "x = 6\r
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\n" ); document.write( "\n" ); document.write( "She has saved for 6 months\r
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\n" ); document.write( "\n" ); document.write( "Let me know if you need more help or if you need me to explain a step in more detail.
\n" ); document.write( "Feel free to email me at jim_thompson5910@hotmail.com
\n" ); document.write( "or you can visit my website here: http://www.freewebs.com/jimthompson5910/home.html\r
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\n" ); document.write( "\n" ); document.write( "Thanks,\r
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\n" ); document.write( "\n" ); document.write( "Jim
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