anonymous
  • anonymous
what is -5/11--5/7
Mathematics
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anonymous
  • anonymous
what is -5/11--5/7
Mathematics
katieb
  • katieb
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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anonymous
  • anonymous
is it: |dw:1352573819063:dw|
anonymous
  • anonymous
thank you, please can you explain
amorfide
  • amorfide
first of all you have a double negative these change to a plus sign

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amorfide
  • amorfide
next you want to get the same denominator to do this |dw:1354103093726:dw|
amorfide
  • amorfide
|dw:1354103213183:dw|basically the fish type thing represents what is being multiplied so for example lets say we have two fractions a/b + c/d |dw:1354103176755:dw| to add them the general method is to do (ad +bc)/bd
amorfide
  • amorfide
do you understand?
anonymous
  • anonymous
You would have to find a common denominator first.
anonymous
  • anonymous
Do you still need help?
amorfide
  • amorfide
following the method I explained gives a common denominator @zordoloom
anonymous
  • anonymous
|dw:1354106538781:dw|\[-\frac{ 5}{ 11 } + \frac{ 5 }{ 7 }\]Find a least common factor of 7 & 11 to find the LCD. Factors of 11: 11, 22, 33, 44, 55, 66, 77 Factors of 7: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77 Least common factor is 77. 11 times 7 = 77 so multiply both the numerator and denominator by 7. \[\frac{ -5 }{ 11 } \times7 = -\frac{35 }{77 }\] 7 times 11 = 77 so multiply both the numerator and denominator by 11. \[\frac{ 5 }{ 7 } \times 11 = \frac{ 55 }{ 77 }\] NOW you can add the fractions: \[-\frac{ 35 }{ 77 } + \frac{ 55 }{ 77 } = \frac{ (-35 + 55) }{ 77 } = \frac{ 20 }{ 77 }\] So: \[-\frac{ 5}{ 11 } + \frac{ 5 }{ 7 }\ =\frac{ 20 }{ 77 }\]
anonymous
  • anonymous

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