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Dafna11 [192]
3 years ago
10

In this triangle cos a / cos b =

Mathematics
2 answers:
olga_2 [115]3 years ago
6 0

coa a / cos b

3/4.24*3/4.24

so it is +1

Mars2501 [29]3 years ago
5 0

Answer:

Its 1

Step-by-step explanation:

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PIT_PIT [208]

Answer:

tan H = 9 / 40

Step-by-step explanation:

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2 years ago
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Math work pls help :)​
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Answer:

b. side angle side. hope this helps

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2 years ago
A perfect score on a test with 25 questions is 100. Each question is worth the same number of points. How many points is each qu
vivado [14]

Answer:

4

Step-by-step explanation:

100 divided by 25 equals 4.

4 0
1 year ago
A number is divisible by 3 if the sum of the digits is divisible by 3 true or false ​
shtirl [24]
ANSWER:
It is true as the divisibility rule of three says -
WE HAVE TO ADD ALL THE DIGITS OF THE NUMBER AND IF THAT SUM IS DIVISIBLE BY THREE THEN THE PARTICULAR NUMBER IS DIVISIBLE BY THREE.
EXAMPLE 2+7=9 and 3*3=9
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8 0
3 years ago
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
2 years ago
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