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olga nikolaevna [1]
2 years ago
14

I NEED HELP ASAP PLZZZ

Mathematics
1 answer:
GalinKa [24]2 years ago
6 0

Answer:

87

Step-by-step

length x width=area

12*8=96-9=87

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V-9/10v+6=11(hlp)this problem is confusing.
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I have 10 goats, n of which are male. I need to choose 2 of them to make a casserole.
snow_tiger [21]

Answer: There are 4 male goats.

Step-by-step explanation:

We know that n of the 10 goats are male.

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p = n/10

Now the total number of goats is 9, and the number of male goats is n -1

then the probability of selecting a male goat again is:

q = (n-1)/9

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(n/10)*((n-1)/9) = 2/15

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n^2 - n - 12  = 0

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For an equation:

a*x^2  + b*x + c =  0

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n = \frac{1 +- \sqrt{(-1)^2 - 4*1*(-12)} }{2*1 } = \frac{1+- 7}{2}

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n = (1 - 7)/2 = -3    (this solution does not make sense, we can not have a negative number of goats)

The other solution is:

n = (1 + 7)/2 = 4

This solution does make sense, this means that we have 4 male goats.

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