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Elodia [21]
2 years ago
6

Hi help me please or do something i dont know

Mathematics
2 answers:
Levart [38]2 years ago
5 0

Answer:

To know the y values in of both the tables I have

y=2.25x.

To get the equation y=2.25x, I need to get the value of y divide by the value of x, repeat this process for both of the tables. You can see that they are all proportional to each other.

For the first table we have:

360÷160=2.25, 1125÷500=2.25, 2700÷1200=2.25

In order to form a equation they all have to have the same proportion.

Then, there you have it.

y=2.25x

For the second table we have:

4.5÷2=2.25, 11.25÷5=2.25, 15.75=2.25

y=2.25x

to check if the equation is right

y=2.25(160)=360 (for the first table)

y=2.25(500)=1125

y=2.25(1200)=2700

Goryan [66]2 years ago
4 0

Answer:

y=2.25x.

Step-by-step explanation:

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Step 3: multiply 3*Y or in this case 3*2 and you will get 6

Step 4: subtract 40-6 and you will get 34

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Step-by-step explanation:

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3 years ago
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3 years ago
xP(x)00.2510.0520.1530.55Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal pl
Nookie1986 [14]

The Solution:

Given:

Required:

Find the standard deviation of the probability distribution.

Step 1:

Find the expected value of the probability distribution.

E(x)=\mu=\sum_{i\mathop{=}0}^3x_iP_(x_i)\begin{gathered} \mu=(0\times0.25)+(1\times0.05)+(2\times0.15)+(3\times0.55) \\  \\ \mu=0+0.05+0.30+1.65=2.0 \end{gathered}

Step 2:

Find the standard deviation.

Standard\text{ Deviation}=\sqrt{\sum_{i\mathop{=}0}^3(x_i-\mu)^2P_(x_i)}=(0-2)^2(0.25)+(1-2)^2(0.05)+(2-2)^2(0.15)+(3-2)^2(0.55)=4(0.25)+1(0.05)+0(0.15)+1(0.55)=1+0.05+0+0.55=1.60

Thus, the standard deviation is 1.60

Answer:

1.60

8 0
1 year ago
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