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asambeis [7]
2 years ago
6

Answer two questions about Systems AAA and BBB: System AAA \text{\quad}start text, end text System BBB \begin{cases}-10x-4y=0\\\

\-2x+7y=8\end{cases} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ ​ −10x−4y=0 −2x+7y=8 ​ \begin{cases}-10x-4y=8\\\\-2x+7y=0\end{cases} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ ​ −10x−4y=8 −2x+7y=0 ​ 1) How can we get System BBB from System AAA?
Mathematics
2 answers:
dem82 [27]2 years ago
8 0

Answer:

A

Step-by-step explanation:

and yes

m_a_m_a [10]2 years ago
6 0

Answer:

Its swap out the order of equations and Yes

Step-by-step explanation:

in khan academy

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A bottler of drinking water fills plastic bottles with a mean volume of 1,000 milliliters (mL) and standard deviation The fill v
trapecia [35]

Answer:

84.13% of bottles will have volume greater than 994 mL

Step-by-step explanation:

Mean volume = u = 1000

Standard deviation = \sigma = 6

We need to find the proportion of bottles with volume greater than 994. So our test value is 994. i.e.

x = 994

Since the data is normally distributed we will use the concept of z-score to find the required proportion. First we convert 994 to its equivalent z-score, then using the z-table we will find the corresponding value of proportion. The formula to calculate the z score is:

z=\frac{x-u}{\sigma}

Substituting the values, we get:

z=\frac{994-1000}{6}=-1

This means 994 is equivalent to a z score of -1. Now we will find the proportion of z values which are greater than -1 from the z table.

i.e. P(z > -1)

From the z-table this value comes out to be:

P(z >- 1) = 1 - P(z < -1) = 1 - 0.1587 = 0.8413

Since, 994 is equivalent to a z score of -1, we can write that proportion of values which will be greater than 994 would be:

P( X > 994 ) = P( z > -1 ) = 0.8413 = 84.13%

4 0
3 years ago
A large paperclip is 7 1/8 inches long. How many paper clips will it take to lay them end to end to have 45 inches.​
aleksandr82 [10.1K]

Answer:

6 Paperclips

Step-by-step explanation:

You first step would be to do 45 divide 7 1/8. Your answer would then be 6 6/19. The last step would be to round 6 6/19. Your answer would then be 6. Your answer would be 6, because you cant have 6/19 of a paper clip.

3 0
3 years ago
Check my answers please?? (multiple choice with pictures)
mariarad [96]
A = bh
A = (22)(18)
A = 396 m²

A = ¹/₂h(b₁ + b₂)
A = ¹/₂(8)(16 + 12)
A = ¹/₂(8)(28)
A = ¹/₂(224)
A = 112 cm²

   P = 2l + 2w
 20 = 2l + 2(4)
 20 = 2l + 8
- 8         - 8
 12 = 2l
  2      2
   6 = l

C = 2πr
C = 2(3.14)(8)
C = 2(25.12)
C = 50.24 in

A = πr²
A = (3.14)(3)²
A = (3.14)(9)
A = 28.26 m²
5 0
3 years ago
<img src="https://tex.z-dn.net/?f=3h%20%3D%207%28%5Cfrac%7B2%7D%7B7%7D%20-%5Cfrac%7B3%7D%7B7%7Dh%29-10" id="TexFormula1" title="
Anit [1.1K]

Your method is correct.

Now,

\implies 3h = -4

Divide both sides with 3

3h \div 3 = -4 \div 3

h = -1.333...

7 0
3 years ago
Read 2 more answers
seven people are seated in a row. They all got up and sit down again in random order. What is the probability that the two origi
inna [77]

Answer:

P(A&B) = 0.4

Explanation:

Because it is a random process and there are no special constraints the probability for everybody is the same, the probability of choosing a particular site is 1/7, the person originally seated in chair number seven has 5/7 chance of not seating in chair number six and seven, the same goes for the person originally seated in chair number six; Because we want the probability of the two events happening, we want the probability of the intersection of the two events, and because the selection of a chair change the probability for the others (Dependents events) the probability P(A&B) = P(A) * P(B/A) where P(A) is 5/7 and the probability of choosing the right chair after the event A is 4/7, therefore, P(A&B) = 4/7*5/7 = 0.4.

If the events were independent the probability would be 0.51.

4 0
3 years ago
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