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anonymous

  • one year ago

Evaluate the function rule for the given value. y = 15*3^x , for x = -3

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  1. anonymous
    • one year ago
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    A) 5/3 B) 5/27 C) 135 D) 5/9

  2. anonymous
    • one year ago
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    @Tazmaniadevil

  3. anonymous
    • one year ago
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    5/9

  4. mathstudent55
    • one year ago
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    y = 15*3^x , for x = -3 Replace x with -3. What do you get?

  5. anonymous
    • one year ago
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    You have \(15 \times 3^{-3}\). In order to change the sign of an exponent, take the reciprocal, i.e. \(3^{-3} = \frac{1}{3^3}\). So now you have\[15\times 3^{-3} = 15\times \frac{ 1 }{ 3^3 } = \frac{15}{3^3}\]Now, evaluate \(3^3\), and simplify the fraction.

  6. anonymous
    • one year ago
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    15/27 @ospreytriple

  7. anonymous
    • one year ago
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    and then we simplify

  8. anonymous
    • one year ago
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    divide them by 3

  9. anonymous
    • one year ago
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    and we get 5/9

  10. anonymous
    • one year ago
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    I have about 2 same questions, I'll try to solve them and can u tell me if im right

  11. anonymous
    • one year ago
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    You are correct. Good job.

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