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Elina [12.6K]
3 years ago
12

Julius is going to have a multi-course meal. The following table shows how many different dishes are

Mathematics
1 answer:
AnnyKZ [126]3 years ago
6 0

Answer:

36

Step-by-step explanation:

If its the khan question 3x4x3

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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.

The probability that in a random selection, the selected goat is a male, is equal to the quotient between the number of male goats (n) and the total number of goats (10)

The probability is;

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

The joint probability (the probability that the two selected goats are male) is equal to the product of the individual probabilities, this is

P = p*q = (n/10)*((n-1)/9)

And we know that this probability is equal to 2/15

Then we have:

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

(n*(n-1))/90 = 2/15

n*(n-1) = 90*2/15 = 12

n^2 - n = 12

n^2 - n - 12  = 0

This is a quadratic equation, we can find the solutions if we use Bhaskara's formula:

For an equation:

a*x^2  + b*x + c =  0

The two solutions are given by:

x = \frac{-b +- \sqrt{b^2 - 4*a*c} }{2*a}

For our case, the solutions will be:

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

The two solutions are:

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.

5 0
3 years ago
Multiple Choice
Crank
Well you have to multipy 4 x 11 and then add 4 x 10
3 0
3 years ago
Is the relation is a function?
Art [367]

Answer:

Step-by-step explanation:

Not a Function​ because : (-20, - 7) and (-20,- 10)

each element must associate with a single

-20 to associate two elements: -10; -7

3 0
3 years ago
Can someone help me on number 4??
Anika [276]
37.5% = 3/8 as a fraction.
So 180 x 8/3 would get you your answer.
Solution: 480
6 0
3 years ago
Which statements must be true?
iVinArrow [24]

Answer:

Following are the solution to the given question:

Step-by-step explanation:

Please find the complete question in the attached file:

Using the formula for Mid-point:

\bar{AB} || \bar{XZ} \\\\CA= \frac{1}{2} \ YZ\\\\\bar{CB} |||\bar{XY}

5 0
3 years ago
Read 2 more answers
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