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LenKa [72]
3 years ago
8

Find x. please help with this question

Mathematics
2 answers:
Lilit [14]3 years ago
6 0
11.875 is the answer
kiruha [24]3 years ago
5 0

Answer:

11.875

Step-by-step explanation:

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Yes: example-because if u are running u are using energy
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Raul calculated that he would spend $125 on school supplies this year. He actually spent $87.50 on school supplies. What is Raul
dybincka [34]

Answer:

C 30%

Step-by-step explanation:

87.50/125= 0.70

1-0.7-0.3

3 0
2 years ago
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In 12 seconds, Valerie counts 6 vehicles passing by her house. At that rate, how many vehicles would pass by in 4 hours
mart [117]
60/12
30 * 4 = 110 cars
5 0
3 years ago
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
Suppose you just flipped a fair coin 8 times in a row and you got heads each time! What is the probability that the next coin fl
Svetllana [295]

Answer:

The probability is 1

Step-by-step explanation:

Given

Number of flips = 8

Outcomes = 8 heads

Required

Probability of getting a head in the next row

This problem can be attributed to experimental probability and it'll be solved using experimental probability formula, which goes as follows;

Probability = \frac{Number\ of\ Occurence}{Total\ Trials}

Let P(Head) represents the probability of getting a head in the next row;

P(Head)= \frac{Outcome\ of\ head}{Total\ Flips}

P(Head)= \frac{8}{8}

P(Head)= 1

Hence, the probability of obtaining a head in the next flip is 1

8 0
3 years ago
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