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DochEvi [55]
3 years ago
5

In a smoking survey among boys between the ages of 12 and 17, 78% prefer to date nonsmokers, 1% prefer to date smokers, and 21%

don’t care. Suppose seven such boys are selected randomly. Let X equal the number who prefer to date nonsmokers and Y equal the number who prefer to date smokers. (a) Determine the joint pmf of X and Y. Be sure to include the support of the pmf. (b) Find the marginal pmf of X. Again include the support.
Mathematics
1 answer:
Ganezh [65]3 years ago
4 0

Answer:

i think it is a

Step-by-step explanation:

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WORTH 50!! Answer it with explanation and the answer is not y+6 I have some idea on how to do this.
mafiozo [28]

Answer:

Therefore, equation of the line that passes through (16,-7) and is perpendicular to the line 2x-3y=12 is 3x+2y=34

Step-by-step explanation:

Given:

2x-3y=12

To Find:

Equation of line passing through ( 16, -7) and is perpendicular to the line

2x-3y=12  

Solution:

2x-3y=12 ...........Given

\therefore y=\dfrac{2}{3}\times x-4

Comparing with,  

y=mx

Where m =slope  

We get

Slope = m1 = \dfrac{2}{3}

We know that for Perpendicular lines have product slopes = -1.

m1\times m2=-1

Substituting m1 we get m2 as

m2=-\dfrac{3}{2}

Therefore the slope of the required line passing through (16 , -7) will have the slope,

m2=-\dfrac{3}{2}

Now the equation of line in slope point form given by

(y-y_{1})=m(x-x_{1})

Substituting the point (16 , -7)  and slope m2 we will get the required equation of the line,

(y-7)=-\dfrac{3}{2}\times (x-16)\\\\2y+14=-3x+48\\3x+2y=34......Equation\ of\ line

Therefore, equation of the line that passes through (16,-7) and is perpendicular to the line 2x-3y=12 is 3x+2y=34

6 0
4 years ago
Can u pls help me with this question
Cloud [144]


You have to solve for the amount of readers.
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4 0
3 years ago
Convert 1400 pounds into kilograms. Round your answer to the nearest whole
jasenka [17]

Answer:

635 (635.0293 not rounded)

8 0
3 years ago
You have 80 pieces of fabric to make a wall hanging. Each piece of fabric is a square with a side length of 5 inches. You use as
tensa zangetsu [6.8K]
Okay. fist off don't think of them as 5 units each, but 1. so if you were to put it on graphing paper and box squares each time. you would be able to get 8 in for both sides to make a square. Area then would be 1600ft squared because 8 ×5 is 40 and 40×40 is 1600. then you calculate how many squares you used. 8×8=64. and 80-64=16 so 16 pieces are left over. then 9×9 (increasing the square) is 81. so 17 pieces to increase it.
5 0
3 years ago
Read 2 more answers
Create a circle with a centre of (0,0) and a radius of 13
Mumz [18]

Answer:

The equation would be:

x^2+y^2=169

In the attachment!!!

<em>Hope this helps!!!</em>

<em>Sofia</em>

3 0
3 years ago
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