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3 years ago

What is 22/9 as a mixed number plz help

2 answers:

5 0

That would be 2/4/9
so you would use long division to solve this
22 divided by 9 would if you 2 with a remainder of 4
The whole number would be 2, the bottom number would be 9
and the numerator would be 4.

Phantasy [73]3 years ago

4 0

22 over 9 is an improper fraction so you have to divide to see how many times 9 can go into 22.the answer is 2 and 4 9ths

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A commuter must pass through 5 traffic lights on her way to work and will have to stop at each one that is red. She estimates th

sergij07 [2.7K]

Answer:

(a) The mean or expected value of X is 2.2.

(b) The standard deviation of X is 1.3.

Step-by-step explanation:

Let X = number of times the traffic light is red when a commuter passes through the traffic lights.

The probability distribution of X id provided.

The formula to compute the mean or expected value of X is:

$\mu=E(X)=\sum x.P(X=x)$

The formula to compute the standard deviation of X is:

$\sigma=\sqrt{E(X^{2})-(E(X))^{2}}$

The formula of E (X²) is:

$E(X^{2})=\sum x^{2}.P(X=x)$

(a)

Compute the expected value of X as follows:

$E(X)=\sum x.P(X=x)\\=(0\times0.06)+(1\times0.25)+(2\times0.35)+(3\times0.15)+(4\times0.13)+(5\times0.06)\\=2.22\\\approx2.2$

Thus, the mean or expected value of X is 2.2.

(b)

Compute the value of E (X²) as follows:

$E(X^{2})=\sum x^{2}.P(X=x)\\=(0^{2}\times0.06)+(1^{2}\times0.25)+(2^{2}\times0.35)+(3^{2}\times0.15)+(4^{2}\times0.13)+(5^{2}\times0.06)\\=6.58$

Compute the standard deviation of X as follows:

$\sigma=\sqrt{E(X^{2})-(E(X))^{2}}\\=\sqrt{6.58-(2.22)^{2}}\\=\sqrt{1.6516}\\=1.285\\\approx1.3$

Thus, the standard deviation of X is 1.3.

4 0

3 years ago

Read 2 more answers

What is the value of the product of -20/48 times 6 in simplified form

KATRIN_1 [288]

-20/48 x 6 = $\frac{-20}{48}$ x $\frac{6}{1}$

I would cancel out the 6 in the numerator and the 48 in the denominator
Now I have $\frac{-20}{8}$ or $\frac{-5}{2}$ reduced.

-5 ÷ 2 = -2 1/2 and that is the answer in simplest form

8 0

3 years ago

If 2p + p = 20 then what is 2p - 5 =

Wewaii [24]

Ok first we have to find out whats 2p+p=20 combine like terms to get 3p=20 the divide 3 on each side to get p=6 2/3 then we plug in 6 2/3 to 2p-5 so 2(6 2/3) -5 so its 12.666-5 to get 7.666 so that's the answer.

4 0

2 years ago

I will mark brainliest when I’m able to !!

Roman55 [17]

Answer:

It should be b

Step-by-step explanation:

I took this test

6 0

3 years ago

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Carole makes an array of magnets on her refrigerator she makes7 rows with 8 magnets in each row which of the following shows how

timofeeve [1]

Answer:this will help

Step-by-step explanation:https://assets.pearsonschool.com/asset_mgr/pending/Grade_3_topic_1_SE_small.pdf

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3 years ago