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Leya [2.2K]
3 years ago
12

Evaluate \dfrac13m-1-\dfrac12n

Mathematics
1 answer:
andrezito [222]3 years ago
3 0

Answer:

The value of given expression is 0, where  m=21 and n=12.

Step-by-step explanation:

The given expression is

\dfrac13m-1-\dfrac12n

substitute m=21 and n=12 in the above expression.

\dfrac13m-1-\dfrac12n=\dfrac13(21)-1-\dfrac12(12)

\dfrac13m-1-\dfrac12n=7-1-6

\dfrac13m-1-\dfrac12n=7-7

\dfrac13m-1-\dfrac12n=0

Therefore the value of given expression is 0, where  m=21 and n=12.

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Answer:

There would be 350 girls in the school.

Step-by-step explanation:

We can find this by creating two proportions. the first fraction would be the number of girls out in the sample:

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Now we can set the two equal to each other and cross multiply.

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