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30 June, 11:21

A company plans to spend exactly 198,000$ annually for advertising a 1 minute radio commercial costs 400$ a 1 minute television commercial costs 5000$ if the company has a total of 60 1 minute television and radio commercials how many of each type of commercial can the company have? solve substitution method and define variables

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  1. 30 June, 13:05
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    X: number of minutes (radio commercial)

    y: number of minutes (television commercial)

    400x+5000y=198 000

    x+y=60

    y=60-x

    400x+5000 (60-x) = 198 000

    400x+300 000-5000x=198 000

    -4600x=-102 000

    x=22.1739 ...

    y=60-22.1739 ...

    y=37.8260 ...

    answer: ± 22 minutes (radio) and ± 38 minutes (television)
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