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2 years ago

UNIT 5 ACTIVITY 2

Mathematics

1 answer:

photoshop1234 [79]2 years ago

4 0

Answer:

your guess is as good as mine

Step-by-step explanation:

good luck tho

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3x - 3y = -3<br>2x - y = -5

Korolek [52]

For this case we must solve the following system of equations:

$3x-3y = -3\\2x-y = -5$

To solve we follow the steps below:

We multiply the second equation by -3:

$-6x + 3y = 15$

Thus, we have the equivalent system:

$3x-3y = -3\\-6x + 3y = 15$

We add the equations:

$3x-6x-3y + 3y = -3 + 15\\-3x = -3 + 15\\-3x = 12\\x = \frac {12} {- 3}\\x = -4$

We look for the value of the variable "y":

$2 (-4) -y = -5\\-8-y = -5\\-y = -5 + 8\\-y = 3\\y = -3$

Thus, the solution of the system is given by:

$(x, y): (- 4, -3)$

Answer:

$(x, y): (- 4, -3)$

4 0

3 years ago

Un automovil gasta 6 litros cada 110 kilometros ¿cuantos kilometros recorrera con 22 litros

natulia [17]

Answer:

403.33 kilometros

Step-by-step explanation:

De la pregunta anterior:

6 litros = 110 kilómetros

22 litros = x

Cruz multiplicar

6 litros × x = 22 litros × 110 kilómetros

x = 22 litros × 110 kilómetros / 6 litros

x = 403.33 kilometros

Así, 22 litros recorrerán 403.33 kilómetros

7 0

3 years ago

Is V'8 greater than, less thar, or equal to 4? Explan

Stels [109]

Answer: Less than.

Step-by-step explanation:

$\sqrt{8}$ is less than 4 because $4^{2}$ is 16. And $\sqrt{8} ^{2}$ is 8.

6 0

3 years ago

Which is a factor of 6x2y + 8x2 – 30y – 40 ?

sattari [20]

If you would like to find a factor of 6x^2y + 8x^2 - 30y - 40, you can calculate this using the following steps:

<span>6x^2y + 8x^2 - 30y - 40 = 2x^2 * (3y + 4) - 10 * (3y + 4) = (3y + 4) * (2x^2 - 10) = 2 * (3y + 4) * (x^2 - 5)
</span>
The correct result would be 3y + 4.

5 0

3 years ago

During the first 13 weeks of the television season, the Saturday evening 8:00 p.m. to 9:00 p.m. audience proportions were record

SpyIntel [72]

Part 1: Do not reject H0. There has not been a significant change in the viewing audience proportions.(The above conclusion holds as the p-value is greater than the significance level of 0.05)

Part 2:

H0:

Ha:

Part 3: The test statistic is given as 3.0081.

Part 4: The p-value is given as 0.39037

Step-by-step explanation:

As per the data

Part 2

H0:

Ha:

Part 3

As per the sample is of 300 homes, the expected values are given as

ABC=p(ABC)*300=0.30*300=90

CBS=p(CBS)*300=0.27*300=81

NBC=p(NBC)*300=0.26*300=78

IND=p(IND)*300=0.17*300=51

Now the values actually are given as

ABC=94

CBS=71

NBC=88

IND=47

So the test static is given as

So the test statistic is given as 3.0081.

Part 4

Now the degree of freedoms are given as 4-1=3

and chi square is given as 3.0081 so for α = 0.05 , the p-value is given as 0.39037

Part 1.

As the value of p in part 4 is greater than the value of α = 0.05, thus Do not reject H0. There has not been a significant change in the viewing audience proportions.(The above conclusion holds as the p-value is greater than the significance level of 0.05)

4 0

3 years ago