anonymous
  • anonymous
Explain please: the ratio of Mark's allowance to Jim's allowance is 3:7 The ratio of Mark's allowance to Wanda's allowance is 2:5. What is the ratio of Jim's allowance to Wanda's allowance?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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phi
  • phi
you know M/J (it is 3/7) you know M/W (2/5) what is J/W ? one way to do this is "solve" for J and solve for W, then take the ratio
phi
  • phi
if M/J= 3/7 then (flip both) J/M= 7/3 multiply both sides by M to get J= 7M/3 can you solve for W in M/W = 2/5 ?
anonymous
  • anonymous
Yes, w = 2m/5

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phi
  • phi
it looks upside down to me
anonymous
  • anonymous
Right, sorry. w = 5m/2
phi
  • phi
now we do J/W \[ \frac{\frac{7m}{3}}{\frac{5m}{2}} \]
anonymous
  • anonymous
so 7m/3:5m/2 7/3:5/2 7/3*2/5 14/15?
phi
  • phi
instead of dividing by 5m/2, multiply by 2/5m
phi
  • phi
yes, that looks good
anonymous
  • anonymous
Okay thank you.

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