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tangare [24]
4 years ago
15

Please answer this one

Mathematics
2 answers:
Anika [276]4 years ago
8 0

Multiply the first equation by 3 and add to the second equation.


3x - 3y = -9

x + 3y = 5

-------------------

4x = -4


x = -1


You are correct.

lawyer [7]4 years ago
3 0

x - y = -3

x + 3y = 5

---------------subtract

-4y = -8

y = 2


x - 2 = -3

x = -1


answer

x = -1

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7. License Plate Laws The Chapter Problem involved passenger cars in Connecticut and passenger cars in New York, but here we con
sergejj [24]

Yes it is true that commercial truck owners violate laws requiring front license plates at a higher rate than owners of passenger cars because null hypothesis is rejected.

Given among 2049 Connecticut passenger cars, 239 had only rear license plates. Among 334 Connecticut trucks, 45 had only rear license plates.

let p_{1} be the probability that commercial cars have rear license plates and p_{2} be the probability that connected trucks have rear license plates.

                         Cars                     Trucks                         Total

Total                  2049                    334                             2383

x                          239                      45                                284

p                        0.1166                   0.1347                          0.1191

α=0.05

Hypothesis will be  :

H_{0}:p_{1} =p_{2}

H_{1} :p_{1} < p_{2}

It is a left tailed test at 0.05 significance.

Standard errors of p=\sqrt{p(1-p)/n}

=\sqrt{(0.1191*0.8809)/2383}

=\sqrt{0.1049/2383}        

=0.0066

Test statistic Z=p difference/standard error

=(0.1166-0.1347)/0.0066

=-0.0181/0.0061

=-2.967

p value=0.001505<5%

Since p is less than 5% we reject null hypothesis.

We cannot calculate standard deviation so  we cannot calculate confidence interval.

Hence there is statistical evidence at 5% significance level to support that commercial truck owners violate laws requiring front license plates at a higher rate than owners of passenger cars.

Learn more about z test at brainly.com/question/14453510

#SPJ4

5 0
2 years ago
Solve the equation <br> M-4=2m
NemiM [27]

Answer:

m=-4

m-4=2m

m-2m=4 combine like terms

-m=4 change the signs on both sides of the equation

m=-4

4 0
3 years ago
VL
Nikolay [14]

9514 1404 393

Answer:

  B.  No

Step-by-step explanation:

If Nate has 100 bananas when 0 days pass, the relationship between bananas and days cannot be proportional. A proportional relationship would have 0 bananas for 0 days.

6 0
3 years ago
Find the area of this shape.<br><br><br><br> The area of the shape is <br> square centimeters.
aniked [119]

Answer:

35 cm

Step-by-step explanation:

To find the area of the bottom portion, you would use the formula for finding out a triangle (B*H*1/2) which is:

(4+4)*5.75*1/2=<u>23</u>

Then, for the top portion, one would find the area of the triangles on the sides (with two marks going through). Since along the middle is 8cm, and along the top is 4, we can see that there is 2cm on either side, so that is the length of the base of the triangle. To solve for the top triangles, you would do almost the same thing as the last one:

2*2*1/2=2

But since there's two identical triangles on either side, we can multiply that by two, which would bring it to <u>4</u>.

That just leaves the rectangle that is left between the two triangles. To solve this, it's just B*H and luckily both of those are labeled for you already:

4*2=<u>8</u>  

Now, to find the total area, all you have to do is add up the areas of the different sections:

23+4+8=35 cm

Hope this helps!

7 0
4 years ago
Help please thank you
Leni [432]

Answer:

$1.61 is the answer

5 0
3 years ago
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