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ch4aika [34]
2 years ago
8

A concession stand owner bought some bottles of water for $0.75 each and began selling them for $1.25 each. When he made back al

l the money he spent, he still had 20 bottles left to sell. What equation can be written to determine the amount of money the owner spent?
Mathematics
1 answer:
Vitek1552 [10]2 years ago
8 0
Its going to be okay 29
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Dr. David Smith lived 1/13 of his life as a child. He spent 4/39 of his life preparing for an outstanding
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Answer:

40 14/25 years

Step-by-step explanation:

Well, this certainly is fun.

First, to find the fraction of the doctor's life which 13 years represents, subtract the fractions from 1 (and in this case l stands for lifetime):

13 = (1 - (\frac{1}{13} + \frac{4}{39} + \frac{1}{2}))(l)

13 = (\frac{25}{78})(l)

So, multiply this equation by the reciprocal of 25/78 to isolate one of l:

13(\frac{78}{25}) = l

l = 40\frac{14}{25} years

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Answer:

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