anonymous
  • anonymous
What is the value of the expression? 7^-3x7^9/7^-8 A. 714 B. 72 C. 7−14 D. 7−2
Mathematics
katieb
  • katieb
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johnweldon1993
  • johnweldon1993
Come on you got this :P \[\large \frac{7^{-3}\times 7^{9}}{7^{-8}}\] Take care of the top first...leave the 7 alone and add the exponents...so -3 + 9 = 6 So now we have \[\large \frac{7^6}{7^{-8}}\] And now we leave the 7 alone again and subtract the exponents \[\large 6 - (-8) = ?\]
anonymous
  • anonymous
so its -14 right?
johnweldon1993
  • johnweldon1993
Nope... \[\large 6 - (-8) = 6 + 8 = ?\]

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anonymous
  • anonymous
oh 14
anonymous
  • anonymous
srry
johnweldon1993
  • johnweldon1993
Lol dont worry about it good job :P

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