anonymous
  • anonymous
https://static.k12.com/bank_packages/files/media/mathml_00c509b7991d272fa7488f654afc6ed0837cdb06_1.gif
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
A. https://static.k12.com/bank_packages/files/media/mathml_8fc70f4b719c089bf0e6d5f264fb8278f767295e_1.gif B. https://static.k12.com/bank_packages/files/media/mathml_132a996ddf78c3f711110c0379813baa252c987f_1.gif C. https://static.k12.com/bank_packages/files/media/mathml_59cbb46cb4ca888001a038b22791e0045c92e376_1.gif D https://static.k12.com/bank_packages/files/media/mathml_cd774f6e6a15b147c719be4cf13ef78e0690d39a_1.gif
anonymous
  • anonymous
D?
welshfella
  • welshfella
Hint Cross multiply and find a in terms of 18 and 7

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anonymous
  • anonymous
Oh A? or C
welshfella
  • welshfella
one of them is correct what did you get after cross multiplying?
anonymous
  • anonymous
126
welshfella
  • welshfella
|dw:1441915733401:dw|
anonymous
  • anonymous
i dont know what A is
welshfella
  • welshfella
no - cross multiplying is as above
welshfella
  • welshfella
you dont multiply 7 by 18 cross multiplying in this case is 7 times a
welshfella
  • welshfella
|dw:1441915864852:dw|
welshfella
  • welshfella
so its 7a = 18
anonymous
  • anonymous
Dont get it honestly.
triciaal
  • triciaal
|dw:1441915939709:dw|
welshfella
  • welshfella
now divide both sides by 7 7a 18 -- = -- 7 7 a = 18 / 7
anonymous
  • anonymous
so isnt it 18 - 7
triciaal
  • triciaal
|dw:1441916048830:dw|
triciaal
  • triciaal
then you can continue with what @welshfella has above to get just a divide each side by 7
anonymous
  • anonymous
A?
anonymous
  • anonymous
OHHH I get it now
triciaal
  • triciaal
great
anonymous
  • anonymous
Thanks!
triciaal
  • triciaal
so answer C
anonymous
  • anonymous
Thanks so much that one i was stumped on forever..

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