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3 years ago

Can someone help me with with my home work i have 45 questions

Mathematics

2 answers:

Shalnov [3]3 years ago

3 0

The answer on the picture is right

DedPeter [7]3 years ago

3 0

You’re right it’s c.

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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

Find the slope of the line whose equation is 8y-16x=12

Mice21 [21]

The formula for slope is y=mx+b
so if you re arrange the equation from 8y-16x=12
to 8y=16x+12
the slope will be the coefficient of x =16

5 0

3 years ago

Solve –15 = 4m – 7. –32 2 –12 –2

Shkiper50 [21]

Answer:

-2 =m

Step-by-step explanation:

–15 = 4m – 7

Add 7 to each side

–15+7 = 4m – 7+7

-8 = 4m

Divide each side by 4

-8/4 = 4m/4

-2 =m

4 0

3 years ago

Write an algebraic expression for the following word phase: the quotient of r and 12

blondinia [14]

The quotient of r and 12

$r:12=r\div12$

The quotient of r and 12 as a fraction

$\dfrac{r}{12}$

3 0

3 years ago

Which of the following correctly shows the length of each radius, the point where the circles intersect, and the equation of the

ollegr [7]

actually box 3 is correct.

because their radiuses are easy to find

but the tangent line is x=-4 or x=4

6 0

3 years ago