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pochemuha
2 years ago
6

What is the value of n? Enter your answer in the box. n =

Mathematics
2 answers:
AnnyKZ [126]2 years ago
3 0
If two chords intersect each other inside a circle, the products of their segments are equal.

18(n+1) = 9(n+7)
18n + 18 = 9n + 63
18n - 9n = 63 - 18
9n = 45
n = 45/9
n = 5
GREYUIT [131]2 years ago
3 0

Answer:

n = 5

Step-by-step explanation:

This problem follows the theorem "If two chords intersect each other inside a circle, the products of their segments are equal."

To follow this theorem, you must multiply both segments of the chord with each other.

Do it to both chords.

The two chords are equal to each other. It should look like:

18*(n+1) = 9*(n+7)

[distributive property]

18n + 18 = 9n + 63

9n = 45

n = 5

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What is the probability that you choose a red marble and then a green marble assure you replace the this marbles
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A box contains 12 balls numbered 1 through 12. Two balls are drawn in succession without replacement. If the second ball has the
Nikitich [7]
<h2>Answer with explanation:</h2>

A box contains 12 balls numbered 1 through 12.

Also the ball are drawn without replacement.

a)

The probability that the first ball had a smaller number on​ it.

i.e. the number on the first ball could be: {1,2,3}

Hence, the probability  that the first ball had a smaller number on​ it is:

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b)

The probability that the first ball has a even number on it is:

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8 0
2 years ago
A bag contains blue and pink balls. There are 8 more blue balls than pink balls. Identify the expression that represents the pro
8_murik_8 [283]
Let 
b---> the original amount of blue balls in the bag
p---> the original amount of pink balls in the bag

we know that
b=8+p
p=5
so
b=8+5----> b=13

step 1
Find the total of balls originally in the bag
total =13+5-----> 18

step 2
find <span>the probability that a person will pick a blue ball first
</span>Find P(b)
P (b)=13/18

step 3
Find the probability that a person will pick a pink ball second <span>without replacement
the total of balls now is (18-1)-------> 17
P(p)=5/17

step 4
Find </span><span>the probability that a person will pick a blue ball first and then a pink ball without replacement 
</span>(13/18)*(5/17)-----> (13*5)/(18*17)------> 65/306-----> 0.21

the answer is
0.21
7 0
2 years ago
Read 2 more answers
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