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anonymous

  • one year ago

plz help me i really need this credit. thanx in advance:) Find the missing term. 7^-147 × 7^98 = 7^18 × 7^-38 ×????

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  1. welshfella
    • one year ago
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    add the exponents on left side we have - 147 + 98 = -49 7^-49 now the right side should also be 7 ^-49 the exponents should add up to -49

  2. anonymous
    • one year ago
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    Sorry im not quite sure what to do with the -49 but the answer choices are: A. 7^(-20) B. 7^22 C. 7^(-29) D. 7^58

  3. anonymous
    • one year ago
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    I think the answer is 7^(-20)

  4. anonymous
    • one year ago
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    thank you welshfella i get it now

  5. welshfella
    • one year ago
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    18 + -38 + x = -49 find x and you have the answer

  6. welshfella
    • one year ago
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    x = -49 - 18 + 38 = ?

  7. welshfella
    • one year ago
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    its not -20

  8. anonymous
    • one year ago
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    I know im goiing to try to solve the equation and see what i get

  9. welshfella
    • one year ago
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    ok

  10. anonymous
    • one year ago
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    so its -29 then?

  11. welshfella
    • one year ago
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    yep

  12. welshfella
    • one year ago
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    recall when you multiply expeontial terms you ADD the exponents eg 5^2 * 5^3 = 5^5

  13. welshfella
    • one year ago
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    answer is 7^-29

  14. anonymous
    • one year ago
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    yes i'll remember that. thank you so much

  15. welshfella
    • one year ago
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    yw

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