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2 years ago

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System A:x=3y=-9 2x=y=4 system B: 3x+4y=-9 2x+y=4 how can we get system b from system A? Are the systems Equivalent? TEST NEED H

ELP!! ASAP

2 answers:

Alja [10]2 years ago

5 0

2x + 3y = 4. 4x + 6y = 9. First, solve the ... First, solve the second equation for x to get x = −2y − 1.

Nadusha1986 [10]2 years ago

3 0

Answer:

I need point

Step-by-step explanation:

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The city council of Pine Bluffs is considering increasing the number of police in an effort to reduce crime. Before making a fin

nikdorinn [45]

Answer:

Part a

The regression equation is, $\hat y = 29.3877 - 0.9596x$

Part b

The number of crimes for a city at 20 police officers was appointed is approximately 10.

Step-by-step explanation:

<u>x y xy x² y²</u>

15 17 255 225 289

17 7 119 289 49

17 13 221 289 169

12 21 252 144 441

25 5 125 625 25

11 19 209 121 361

27 7 189 729 49

22 6 132 484 36

146 95 502 2906 1419

Therefore,

$\hat B_1=\frac{n \sum xy - (\sum x) (\sum y)}{n (\sum x^2) - (\sum x)^2}$

$= \frac{8(1502) - (146)(95)}{8(2906)-(146)^2} \\\\= \frac{-1854}{1932} \\\\= - 0.9596$

The calculation of the intercept coefficient is as follows:

$\hat B_0= \frac{\sum y }{n} - \hat B_1 (\frac{\sum x}{n} )$

$= \frac{95}{8} - (-0.9596)(\frac{146}{8} )\\\\= 11.875 + 17.5127\\\\= 29.3877$

The regression equation is, $\hat y = 29.3877 - 0.9596x$

b)

The calculation is as follows:

$\hat y= 29.3877 - 0.9596x\\\\= 29.3877-0.9596(20)\\\\=29.3877-19.1920\\\\=10.1957$

≅ 10

The number of crimes for a city at 20 police officers was appointed is approximately 10.

The number of crimes for a city at 20 police officers was appointed is approximately 10.

That is, the number of polices increases then the number of crimes will be decreases.

8 0

3 years ago

Help lol..............<br><br> Which table below does not represent a function?

vlabodo [156]

Answer:

Option 2

Step-by-step explanation:

if an input produces more than one output, the table does not represent a function.

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2 years ago

What is the formula of what is the formula of a square + b square

tester [92]

Answer:

Step-by-step explanation:

a² + b² = (a + b)² - 2ab

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2 years ago

What is an integer between the square root of 30 and 4*Pi divided by 3

Andru [333]

$\sqrt{30}\approx5.5\\
\frac{4\pi}{3}\approx4.2$

It's 5.

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3 years ago

IND 11. Kim is arranging magazines on shelves. She has 18 sports magazines and 24 news magazines. Each shelf will have the same

Lisa [10]

Find the multiples of each number:

18: 1 , 2 , 3 , 6 , 9 , 18

24: 1, 2, 3, 4, 6 , 8, 12, 24

Now find the matching numbers:

1 , 2, 3 , 6

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3 years ago