anonymous
  • anonymous
in preparation for the final exam, which counts as two exams, a student has scores of 88 and 97 and 91. what does the student need on the final exam to have a 90 average?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
(88+97+91+x)/4=90 360-88-97-91=x=84
anonymous
  • anonymous
oh wait, thats also wrong! counts as two exams...
anonymous
  • anonymous
(88+97+91+2x)/5=90 x=87

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anonymous
  • anonymous
just curious, what are these questions for?
anonymous
  • anonymous
math final i am in a remedial math class
anonymous
  • anonymous
I see... keep working at it!

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