A man started to work in 1985 at an annual salary of \$8{,}000. He received a $600 raise each year. How much was his salary in 2012?

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  1. check your typing

    Is that supposed to say $8,000 ?

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  2. yes it is

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  3. in x years since 1985, the salary is

    s(x) = 8000+600x

    so, plug in x = 2012-1985

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  4. This is an arithmetic progression
    a=800 d=600
    From 1985 to 2012 would be the 28th term:
    8000 +27(600)=24200

    He would receive 24200 in 2012

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