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Natasha_Volkova [10]
3 years ago
8

Find the value of BCF angle.​

Mathematics
2 answers:
Yuki888 [10]3 years ago
4 0
Since the triangle is a right angle at BFC, wouldn’t that indicate it’s either 30°, 45°, or 60°? What are the values for the side dimensions?
kkurt [141]3 years ago
3 0

Answer:

triangleBFCBis an isosceles triangle

angleBFC=90°

angle FBC and angle BCF are equal

let angle FBC=x,angleBCF=x

the sum of angles in a triangle=180°

90+x+x=180°

90+2x=180

2x=180-90

2x=90

divide both sides by 2

2x÷2=90÷2

x=45°

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Inside the box of every cereal box contains a surprise gift. The store manager assures employees that 22 of the 45 boxes on the
kherson [118]

Answer:

0.2333 = 23.33% probability that both of them have the secret decoder ring

Step-by-step explanation:

The cereals are chosen without replacement, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

In this question:

45 boxes, which means that N = 45

22 have the secret decoder ring, which means that k = 22

Two boxes, which means that n = 2

What is the probability that both of them have the secret decoder ring?

This is P(X = 2). So

P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}

P(X = 2) = h(2,45,2,22) = \frac{C_{22,2}*C_{23,0}}{C_{45,2}} = 0.2333

0.2333 = 23.33% probability that both of them have the secret decoder ring

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otez555 [7]
The prices of the scuba gear in a store arranged by intervals which is 1. Is the answer
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Is that the only ones I used
jek_recluse [69]

Answer:

yes

Step-by-step explanation:

7 0
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1.
mariarad [96]

Answer:

80 questions

Step-by-step explanation:

100%/20%=5%

5×16=80

Therefore, there are 80 questions in the test.

7 0
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HURRY !!! PLEASE HELP!!
sesenic [268]

Answer:

2. it stays the same even if the angles in the triangle change

a. the angles must add up to 180º. a straight line is equal to 180º, so as long as the angles add up to 180º, it will be a straight line.

5. it represents the sum of the measures of the interior angles of the triangle

a. Kellianne lined up the interior angles of the triangle. if added they equal 180º which is the measure of the straight line.

7. it combines the three interior angles of the triangle to form a straight line

a. same answers as previous

8. it is a straight line with a measure of 180º

a. refer to above

hope this helps :)

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