document.write( "Question 830780: Hi there, someone helped me earlier this week and it was awesome! Thank you!
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document.write( "Here's my question...\r
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document.write( "It's about Arithmetic Sequences and finding the nth term. \r
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document.write( "Chem deposited $115 into a savings account. Each week thereafter, he deposits $35 into the account. \r
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document.write( "A. Write the formula to find the total amount Chem has deposited for n weeks after his initial deposit.\r
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document.write( "B.How much had Chem deposited 30 weeks after his initial deposit?\r
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document.write( "I am using the formula: a_n = a_1 + (n-1)d
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document.write( " a_1=115
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document.write( " d=35
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document.write( " I got 35n + 80; $1,130
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document.write( " BUT...the book answer says 35n + 115; $1,165\r
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document.write( "I am wondering if I'm reading the problem wrong and the key is how much he deposited \"after\" the initial deposit. Thanks so much for answering my question!\r
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document.write( "Isabella \n" );
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Algebra.Com's Answer #500849 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! use the following formula \n" ); document.write( "a_n = a_0 + (n)d \n" ); document.write( "where a_0 = 115, n = 30, and d = 35 \n" ); document.write( "a_n = 115 + (30 * 35) \n" ); document.write( "a_n = 115 + 1050 \n" ); document.write( "a_n = 1165 \n" ); document.write( "30 weeks after initial deposit, means that n = 30 \n" ); document.write( " \n" ); document.write( " |