benlindquist
  • benlindquist
The product of a number and -7/10 is 1/2 which is the number. Will medal
Mathematics
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SOLVED
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jamiebookeater
  • jamiebookeater
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benlindquist
  • benlindquist
The options are -(5/7), (5/7) -(7/20), (7/20)
benlindquist
  • benlindquist
i got -7/20
welshfella
  • welshfella
- 7/10 * x = 1/2 you need to find x multiply both sides of the equation by -10/7

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More answers

benlindquist
  • benlindquist
so -7/10 x -7/10 and 1/2 x -7/10.
benlindquist
  • benlindquist
7/20
welshfella
  • welshfella
yes this will make the left side x (which is what we want) and you cam work out right sied
benlindquist
  • benlindquist
so the answer is 7/20
welshfella
  • welshfella
- no :- multiply by -10/7 not -7/10
welshfella
  • welshfella
|dw:1450111588765:dw|
benlindquist
  • benlindquist
wait was the answer -7/20
welshfella
  • welshfella
and the right side is |dw:1450111673183:dw|
welshfella
  • welshfella
we multiply by the INVERSE of -7/10 in order to isolate the x the inverse of -7/10 is -10/7
benlindquist
  • benlindquist
|dw:1450111851257:dw|
benlindquist
  • benlindquist
|dw:1450111872186:dw|
welshfella
  • welshfella
|dw:1450111838284:dw|
benlindquist
  • benlindquist
ok
benlindquist
  • benlindquist
so 5 over 7
welshfella
  • welshfella
multiply factions by just multiplying numerators and denominators. -10/14 simplifies to -5/7 (dividing top and bottom by 2)
benlindquist
  • benlindquist
oh ok i get it
welshfella
  • welshfella
negative 5 over seven

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