anonymous
  • anonymous
how do you simplify 3/7 - 4/m
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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lgbasallote
  • lgbasallote
\[\huge \frac 3{7 - \frac 4m}\] ???
anonymous
  • anonymous
|dw:1347061531315:dw|
anonymous
  • anonymous
\[A. \frac{ 3m-28 }{ 7m } B. -\frac{ 1 }{ 7m} C. -\frac{ 25 }{7m} D. -\frac{ 25 }{ 7}\]

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anonymous
  • anonymous
how do i simiplify it though?
anonymous
  • anonymous
multiply not multiplay lol
anonymous
  • anonymous
You must get a common denominator.. My sugestion multiplay the left side by m/m and the right side by 7/7 then you can just subtract the numerators
anonymous
  • anonymous
Answer A is the answer to the question as reiterated by Abirla above. We get it in the following manner\[\frac{3}{7}-\frac{4}{m}=\frac{3}{7}\frac{m}{m}-\frac{4}{m}\frac{7}{7}=\frac{3m}{7m}-\frac{28}{7m}=\frac{3m-28}{7m}\]
anonymous
  • anonymous
The answer is (a). You need to find a common denominator. Multiply (3/7) by m/m which is essentially 1. Also multiply 4/m by 7/7. Now you can do the subtraction to get (a)
anonymous
  • anonymous
As Chyme said just above, multiply each term by one in a form that will give a common denominator (in this case, 7m).
anonymous
  • anonymous
exact what i was thinking' the denominator is 7m
Hero
  • Hero
Ha, I like multiplay better than multiply

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