anonymous
  • anonymous
please help this ones pretty tough... The list price of a book is $15. But if more than 12 copies are purchased, then the price per copy is reduced by $0.20 for every copy above 12. This is, $14.80 per copy for 13 copies, $14.60 per copy for 14 copies, and so on. Which of the following is the rule for this function p(x)?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
A.
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anonymous
  • anonymous
B.
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anonymous
  • anonymous
C.
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jdoe0001
  • jdoe0001
is much better to show it in 1 graphic, than scattered over 4 or so pictures
anonymous
  • anonymous
D.
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anonymous
  • anonymous
it was impossible to save them all together sorry for the inconvenience
jdoe0001
  • jdoe0001
so, let's take a look from 1 - 12 books, you pay regular retail price \(\large $15\ if \ 1\le x \le 12\) for the 13th book and above, you pay .20 less per unit so 13-12 1 unit, 0.20 less so 14-12 2 units, 0.40 less so 15-12 3 units, 0.60 less so \(\color{blue}{15 - 0.20\times unit}\) for units above the 12th one so, which one do you think?
anonymous
  • anonymous
either b or c?
jdoe0001
  • jdoe0001
b or c, so, which one would be?
anonymous
  • anonymous
oh actually c?
jdoe0001
  • jdoe0001
what's wrong with b?
anonymous
  • anonymous
your adding 15+.2 instead of subtracting
jdoe0001
  • jdoe0001
yep, it's c then :)
anonymous
  • anonymous
thanks:)
jdoe0001
  • jdoe0001
yw

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