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s344n2d4d5 [400]
3 years ago
14

6) x+ 1 - 4 3х +6 Simplify

Mathematics
1 answer:
Anni [7]3 years ago
5 0

Answer:

9X +3

Step-by-step explanation:

6X+ 3X =9X

1-4+6=3

(1-4=-3)

9X+3

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Suppose we have an unfair coin that its head is twice as likely to occur as its tail. a)If the coin is flipped 3 times, what is
Alenkinab [10]

Answer: a) 0.2222, b) 0.3292, c) 0.1111

Step-by-step explanation:

Since we have given that

Let the probability of getting head be p.

Since,  its head is twice as likely to occur as its tail.

p+\dfrac{p}{2}=1\\\\\dfrac{3p}{2}=1\\\\p=\dfrac{2}{3}

a)If the coin is flipped 3 times, what is the probability of getting exactly 1 head?

So, here, n  = 3

p=\dfrac{2}{3}

q=\dfrac{1}{3}

Now,

P(X=1)=^3C_1(\dfrac{2}{3})^1(\dfrac{1}{3})^2=0.2222

b)If the coin is flipped 5 times, what is the probability of getting exactly 2 tails?

2 tails means 3 heads.

So, it becomes,

P(X=3)=^5C_3(\dfrac{2}{3})^3(\dfrac{1}{3})^2=0.3292

c)If the coin is flipped 4 times, what is the probability of getting at least 3 tails?

P(X\leq 1)=\sum _{x=0}^1^4C_x(\dfrac{2}{3}^x(\dfrac{1}{3})^{4-x}=0.1111

Hence, a) 0.2222, b) 0.3292, c) 0.1111

8 0
3 years ago
The rectangle shown has a perimeter of 7272 cm and the given area. its length is 66 more than four timesfour times its width. wr
Vadim26 [7]
<span>Width = 6 Length = 30 We know the perimeter of a rectangle is simply twice the sum of it's length and width. So we have the expression: 72 = 2*(L + W) And since we also know for this rectangle that it's length is 6 more than 4 times it's width, we have this equation as well: L = 6 + 4*W So let's determine what the dimensions are. Since we have a nice equation that expresses length in terms of width, let's substitute that equation into the equation we have for the perimeter and solve. So: 72 = 2*(L + W) 72 = 2*(6 + 4*W + W) 72 = 2*(6 + 5*W) 72 = 12 + 10*W 60 = 10*W 6 = W So we now know that the width is 6. And since we have an expression telling us the length when given the width, we can easily determine the length. So: L = 6 + 4*W L = 6 + 4*6 L = 6 + 24 L = 30 And now we know the length as well.</span>
5 0
3 years ago
IF k/3- 9 = 12, what is the value of k?<br> Α. 1<br> B. 7 <br> C. 9<br> D.63
Mkey [24]

Answer:

D. 63

Step-by-step explanation:

k/3 - 9 = 12

k/3 = 21

k = 63

6 0
2 years ago
Read 2 more answers
Evaluate (2/3) exponent 2
Nady [450]

(2/3) ^2=

2^2/3^2=

4/9

6 0
2 years ago
What integer does the square root of 18 lie between
hichkok12 [17]
4 < \sqrt{18} < 5\\\\because:\\\\4=\sqrt{4^2}=\sqrt{16} < \sqrt{18} \\\\5=\sqrt{5^2}=\sqrt{25} > \sqrt{18}
8 0
2 years ago
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