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Pani-rosa [81]
3 years ago
12

2/3 of a class are girls

Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
5 0

Answer:

2:3 girls

1:3 boys

Step-by-step explanation:

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So we are given the following system:
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Using the first equation again we get:
3x^2-4y^2=25\\&#10;3x^2=4y^2+25\\&#10;x^2= \frac{1}{3}(4y^2+25)\\x^2= \frac{1}{3}(4 \frac{1}{5} +25)\\= \frac{43}{5}\\x=\pm \sqrt{ \frac{43}{5} }
3 0
3 years ago
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sukhopar [10]

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23

Step-by-step explanation:

20 *.15=3

20+3=23

3 0
2 years ago
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