anonymous
  • anonymous
perform the indicated operation 2/r+9/r-8
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
Your common denominator is r(r-8) so you need to create two fractions with r(r-8) on the bottom. ????/r(r-8) + ????/r(r-8). You then ask yourself what do I need to multiply the r on the bottom of the first fraction to get r(r-8)....... you need an "r-8" so you multiply the top by "r-8" and you get 2(r-8) = 2r - 16 so you now have (2r - 16)/(r(r-8) + Then you ask yourself what do I need to multiply the "r-8" on the bottom of the second fraction to get r(r-8).... you need an "r" so you multiply the top by "r" and you get 9r/(r(r-8)) so you now have (2r - 16)((r(r-8)) + 9r/((r(r-8)) so you have (11r - 16)/(r(r-8)) ** You don't need the ( )'s when you write this down, I just used them so you know what is on top of what.. You wil need the r(r-8) parentheses.
anonymous
  • anonymous
greatly explained if i could become a fan twice i would

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