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Romashka-Z-Leto [24]

2 years ago

14

Plsss help and explain too

1 answer:

9966 [12]2 years ago

4 0

Answer:

see explanation

Step-by-step explanation:

Since the triangles are similar then the ratio of corresponding sides are equal, that is

$\frac{4}{3}$ = $\frac{a}{4}$ ( cross- multiply )

3a = 16 ( divide both sides by 3 )

a = $\frac{16}{3}$

and

$\frac{4}{3}$ = $\frac{b}{5}$ ( cross- multiply )

3b = 20 ( divide both sides by 3 )

b = $\frac{20}{3}$

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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

Help I need an answer ASAP will give brainliest

MrMuchimi

The answer is a=6, b=4, and 0=3 you can always try to find the answer in google though

Hope that helped

6 0

2 years ago

Solve the equation 58 - 10x ≤ 20 + 9x

drek231 [11]

Answer:

x≥2

Step-by-step explanation:

First, write out the equation as you have it:

$58-10x\leq20+9x$

Then, add $10x$ to both sides:

$58-10x+10x\leq20+9x+10x\\58\leq20+19x$

Next, subtract $20$ from both sides:

$58-20\leq20-20+19x\\38\leq19x$

Finally, divide both sides by $19$ :

$\frac{38}{19}\leq\frac{19x}{19}\\2\leq x$

or

$x\geq 2$

Therefore: the answer to this inequality/equation is: x≥2

6 0

3 years ago

The value of the 8th term is 78.

trapecia [35]

Answer:

108

Step-by-step explanation:

4 0

2 years ago

Darren's rectangle measures 3 1/4 units by 4 1/3 units. what is its area <br><br> area = ? ?/?

Hatshy [7]

Answer:

14 1/13

Step-by-step explanation:

13/4*13/3=169/12=14 1/13

4 0

1 year ago